111970. Dall, W. H.   Some American Conchologists: An Address Delivered at the Eighth Anniversary Meeting of the Biological Society of Washington.   Biological Society of Washington, 1888, Proceedings of the Biological Society of Washington, Volume 4 : pages 95-134 pages with illustrations.   Softbound, removed from a larger binding, repair to spine, previous owners names, good condition.    $17.00

111972. Dall, W. H.   Deep Sea Mollusks and the Conditions Under which They Exist: An Address Delivered at the Ninth Anniversary Meeting of the Biological Society of Washington.   Biological Society of Washington, 1890, Proceedings of the Biological Society of Washington, Volume 5 : 22 pages.   Softbound, removed from a larger binding, repair to spine, previous owners names, good condition.    $9.00

111971. Dall, W. H.   On Dynamic Influences in Evolution.   Biological Society of Washington, 1890, Proceedings of the Biological Society of Washington, 10 pages.   Softbound, previous owner name, tape repair to spine, good condition.    $8.00

43019. Biological Society of Washington.   Constitution and By-Laws and Rules Relating to Publication.   Biological Society of Washington, 1892, Proceedings of the Biological Society of Washington, Volume 7 : pages vii-xv.   Printed wraps, some minor edge wear and age discoloration, text in very good condition.    $5.00

43169. Merriam, C. H. and Rose, J. N.   Description of a New Genus and Species of Murine Rodent (Xenomys nelsoni) from the State of Colima, Western Mexico and Descriptions of Nine New Mammals Collected by E. W. Nelson in the States of Colima and Jalisco, Mexico.   Biological Society of Washington, 1892, Proceedings of the Biological Society of Washington, 7 : 159-174.   Printed wraps, previous owners name on front, other minor signs of use and age, very good condition.    $34.00

43170. Merriam, C. H. and Rose, J. N.   The Occurrence of Cooper's Lemming Mouse (Synaptomys cooperi) in the Atlantic States.   Biological Society of Washington, 1892, Proceedings of the Biological Society of Washington, 7 : 175-177.   Home made wraps, previous owners name on front, other signs of use and age, good plus condition.    $4.00

118436. Bangs, O.   Notes on Birds from Western Colombia.   Biological Society of Washington, 1896, Proceedings of the Biological Society of Washington, Volume 21 : pages 157-162.   Softbound, previous owners inscription, good plus condition.    $4.00

43178. Bangs, O.   A Review of the Squirrels of Eastern North America.   Biological Society of Washington, 1896, Proceedings of the Biological Society of Washington, 10 : pages 145-167 with 4 text figures and 3 plates.   Off-print, Robert J. Russell book stamp, minor signs of use and age, very good condition.    $14.00

43176. Bangs, O.   A Review of the Weasels of Eastern North America.   Biological Society of Washington, 1896, Proceedings of the Biological Society of Washington, 10 : pages 1-24 and 3 plates.   Off-print, Robert J. Russell book stamp, minor signs of use and age, very good condition.    $31.00

43181. Bailey, V.   Revision of the American Voles of the Genus Evotomys.   Biological Society of Washington, 1897, Proceedings of the Biological Society of Washington, 11 : pages 113-138 and 1 plate.   Off-print, Robert J. Russell book stamp, minor signs of use and age, very good condition.    $16.00

43180. Miller, G. S.   Synopsis of the Voles of the Genus Phenacomys.   Biological Society of Washington, 1897, Proceedings of the Biological Society of Washington, 11 : pages 77-87.   Printed wraps, Robert J. Russell book stamp, minor signs of use and age, very good condition.    $14.00

24608. Nelson, E. W.   Description of New Birds from Mexico, with A Revision of the Genus Dactylortyx.   Biological Society of Washington, 1898, Proceedings, 12 : 57-68.   Offprint, age discoloration, previous owners name on first page, minor signs of use and age, text in very good condition.   Wonderful professional natural history publication.   $4.00

43006. Merriam, C. H.   Description of Twenty New Species and A New Subgenus of Peromyscus from Mexico and Guatemala.   Biological Society of Washington, 1898, Proceedings of the Biological Society of Washington, 12 : pages 115-125 with 1 figure.   Off-print, Robert J. Russell book stamp, minor signs of use and age, very good condition.    $8.00

43008. Miller, G. S.   The Systematic Name of the Cuban Red Bat.   Biological Society of Washington, 1900, Proceedings of the Biological Society of Washington, 13 : pages 155.   Off-print, Robert J. Russell signature, minor signs of use and age, very good condition.    $1.00

43009. Mearns, E. A.   Note on Dipodomys Montanus Baird.   Biological Society of Washington, 1900, Proceedings of the Biological Society of Washington, 13 : pages 167.   Off-print, Robert J. Russell signature, signs of use and age, good condition.    $1.00

43012. Merriam, C. H.   Descriptions of Twenty-three New Pocket Gophers of the Genus Thomomys.   Biological Society of Washington, 1901, Proceedings of the Biological Society of Washington, 14 : pages 107-117.   Off-print, Robert J. Russell book stamp, minor signs of use and age, very good condition.    $8.00

43013. Mearns, E. A.   A New Pocketmouse from Southern California.   Biological Society of Washington, 1901, Proceedings of the Biological Society of Washington, 14 : pages 135-136.   Off-print, Robert J. Russell signature, minor signs of use and age, very good condition.    $2.00

43011. Miller, G. S.   The Alpine Varying Hare.   Biological Society of Washington, 1901, Proceedings of the Biological Society of Washington, 14 : pages 97-98.   Off-print, Robert J. Russell signature, signs of use and age, good condition.    $2.00

43010. Miller, G. S.   Five New Shrews From Europe.   Biological Society of Washington, 1901, Proceedings of the Biological Society of Washington, 14 : pages 41-45.   Off-print, Robert J. Russell signature and John A. White book stamp, minor signs of use and age, very good condition.    $5.00

43018. Mearns, E. A.   On the Mainland Forms of the Eastern Deermouse, Peromyscus leucopus (Rafinesque).   Biological Society of Washington, 1901, Proceedings of the Biological Society of Washington, 14 : pages 153-155.   Off-print, Robert J. Russell book stamp, minor signs of use and age, very good condition.    $3.00

68728. Miller, G. S.   Note on the Vespertilio incautus of J. A. Allen.   Biological Society of Washington, 1902, Proceedings of the Biological Society of Washington, Volume 15 : page 155.   Reprint, previous owners name, minor signs of use and age, text in very good condition.    $1.00

68724. Miller, G. S.   The Technical Name of the Virginia Deer.   Biological Society of Washington, 1902, Proceedings of the Biological Society of Washington, Volume 15 : page 39.   Reprint, previous owners name, minor signs of use and age, text in very good condition.    $1.00

68725. Merriam, C. H.   Twenty New Pocket Mice (Heteromys and Liomys) from Mexico.   Biological Society of Washington, 1902, Proceedings of the Biological Society of Washington, Volume 15 : page 41-50.   Reprint, previous owners book stamp, minor signs of use and age, text in very good condition.    $8.00

68726. Miller, G. S.   A New Rabbit from Southern Texas.   Biological Society of Washington, 1902, Proceedings of the Biological Society of Washington, Volume 15 : page 81-82.   Reprint, previous owners name, minor signs of use and age, text in very good condition.    $2.00

68727. Bailey, V.   Synopsis of the North American Species of Sigmodon.   Biological Society of Washington, 1902, Proceedings of the Biological Society of Washington, Volume 15 : page 101-116.   Reprint, previous owners book stamp, minor signs of use and age, text in very good condition.    $12.00

68729. Miller, G. S.   Note on the Vespertilio incautus of J. A. Allen.   Biological Society of Washington, 1902, Proceedings of the Biological Society of Washington, Volume 15 : page 155.   Text extracted from a larger volume, previous owners name, minor signs of use and age, text in very good condition.    $1.00

68730. Miller, G. S.   A New Bat from the Island of Dominica.   Biological Society of Washington, 1902, Proceedings of the Biological Society of Washington, Volume 15 : page 243-244.   Reprint, previous owners name, minor signs of use and age, text in good condition.    $2.00

68731. Miller, G. S.   The Common Nyctinomus of the Greater Antilles.   Biological Society of Washington, 1902, Proceedings of the Biological Society of Washington, Volume 15 : page 248.   Reprint, previous owners name, minor signs of use and age, text in very good condition.    $1.00

68732. Miller, G. S.   An Overlooked Specimen of Chilonycteris psilotis.   Biological Society of Washington, 1902, Proceedings of the Biological Society of Washington, Volume 15 : page 249.   Reprint, previous owners name, minor signs of use and age, text in very good condition.    $1.00

68733. Miller, G. S.   The Status of Nyctinomus nevadensis (H. Allen).   Biological Society of Washington, 1902, Proceedings of the Biological Society of Washington, Volume 15 : page 250.   Reprint, previous owners name, minor signs of use and age, text in good plus or better condition.    $1.00

67560. Nelson, A.   The Genus Hedysarum in the Rocky Moutnains.   The Biological Society of Washington, 1902, Proceedings of the Biological Society of Washington, Volume 15 : pages 183-186.   Reprint, previous owners book stamp, minor signs of use and age, text in very good condition.    $4.00

111973. Dall, W. H.   Review of the Classification of the Cyrenacea.   Biological Society of Washington, 1903, Proceedings of the Biological Society of Washington, Volume 16 : pages 5-8.   Softbound, stapled text as issued, good or better condition.    $2.00

111975. Dall, W. H.   Diagnoses of New species of Mollusks from the Santa Barbara Channel, California.   Biological Society of Washington, 1903, Proceedings of the Biological Society of Washington, Volume 16 : pages 171-176.   Softbound, stapled text as issued, good or better condition.    $3.00

24610. Nelson, E. W.   Descriptions of New Birds from Southern Mexico.   Biological Society of Washington, 1903, Proceedings, 16 : 151-160.   Previous owners stamp on front page, minor signs of use and age, text in very good condition.   Wonderful professional natural history publication.   $4.00

24609. Ridgway, R.   Descriptions of New Genera Species and Subspecies of American Birds.   Biological Society of Washington, 1903, Proceedings, 16 : 105-112.   Minor signs of use and age, text in very good condition.   Wonderful professional natural history publication.   $4.00

67562. Nelson, A. and Cockerell, T. D.   Three New Plants from New Mexico.   The Biological Society of Washington, 1903, Proceedings of the Biological Society of Washington, Volume 16 : pages 45-46.   Reprint, previous owners book stamp, minor signs of use and age, text in very good condition.    $2.00

68735. Bangs, O.   Description of a New Neotoma from Mexico.   Biological Society of Washington, 1903, Proceedings of the Biological Society of Washington, Volume 16 : page 89-90.   Reprint, previous owners names, signs of use and age, text in good condition.    $2.00

67561. Nelson, A.   Psilostrophe, A Neglected genus of Southwestern Plants.   The Biological Society of Washington, 1903, Proceedings of the Biological Society of Washington, Volume 16 : pages 19-24.   Reprint, previous owners book stamp, minor signs of use and age, text in very good condition.    $5.00

68740. Miller, G. S.   A Second Specimen of Euderma Maculatum.   Biological Society of Washington, 1903, Proceedings of the Biological Society of Washington, Volume 16 : page 165-166.   Reprint, previous owners name, minor signs of use and age, text in very good condition.    $2.00

68736. Miller, G. S.   A New Nataline Bat from the Bahamas.   Biological Society of Washington, 1903, Proceedings of the Biological Society of Washington, Volume 16 : page 119-120.   Reprint, previous owners book stamp, minor signs of use and age, text in very good condition.    $2.00

68739. Miller, G. S.   A New Hare from Greece.   Biological Society of Washington, 1903, Proceedings of the Biological Society of Washington, Volume 16 : page 145-146.   Reprint, previous owners name, minor signs of use and age, text in very good condition.    $2.00

67563. Nelson, A.   New Plants from Nevada.   The Biological Society of Washington, 1904, Proceedings of the Biological Society of Washington, Volume 17 : pages 91-98.   Reprint, previous owners book stamp, minor signs of use and age, text in very good condition.    $8.00

68741. Osgood, W. H.   Thirty New Mice of the Genus Peromyscus from Mexico and Guatemala.   Biological Society of Washington, 1904, Proceedings of the Biological Society of Washington, Volume 17 : page 55-77.   Reprint, previous owners book stamp, minor signs of use and age, text in very good condition.    $11.00

43020. Nelson, E. W.   A Review of the North American Mainland Species of Myiarchus.   Biological Society of Washington, 1904, Proceedings of the Biological Society of Washington, Volume 17 : pages 21-50 with 1 figure.   Off-print, stapled text, previous owners name on front, other minor signs of use and age, very good condition.    $11.00

20206. Dall, W. H. and Bartsch, P.   Synopsis of the Genera, Subgenera and Sections of the Family Pyramidellidae.   Biological Society of Washington, 1904, Proceedings, 17 : 1-16.   Off-print, minor previous owner mark on front wrap, usual signs of use and age discoloration, text in very good condition.    $12.00

118431. Osgood, W. H.   Chamaea fasciata and Its Subspecies.   Biological Society of Washington, 1904, Proceedings of the Biological Society of Washington, Volume 13 : page 41-42.   Softbound, signs of use and age, good minus condition.    $1.00

67564. Nelson, A.   Plantae Andrewseae.   The Biological Society of Washington, 1904, Proceedings of the Biological Society of Washington, Volume 17 : pages 173-180.   Reprint, previous owners book stamp, minor signs of use and age, text in very good condition.    $8.00

111974. Dall, W. H.   General Notes. Note on the Name Hendersoni and Note on the Earliest use of the Generic Name Purpura in Binomial Nomenclature.   Biological Society of Washington, 1905, Proceedings of the Biological Society of Washington, Volume 18 : pages 189-190.   Softbound, stapled text as issued, good or better condition.    $1.00

68746. Miller, G. S.   A New Bat from German East Africa.   Biological Society of Washington, 1905, Proceedings of the Biological Society of Washington, Volume 18 : page 227-228.   Reprint, previous owners name, minor signs of use and age, text in very good condition.    $2.00

118433. Mearns, E. A.   Descriptions of a Eight New Philippine Birds, with Notes on Other Species New to the Islands.   Biological Society of Washington, 1905, Proceedings of the Biological Society of Washington, Volume 18 : pages 83-90.   Softbound, previous owners stamp, good plus or better condition.    $4.00