Vol. 13. 1. Five natural hybrid combinations in minnows (Cyprinidae). By Frank B. Cross and W. L. Minckley.

Pp. 1-18. June 1, 1960.

2. A distributional study of the amphibians of the Isthmus of Tehuantepec, Mexico. By William E. Duellman. Pp.

19-72, pls. 1-8, 3 figures in text. August 16, 1960. 50 cents.

3. A new subspecies of the slider turtle (Pseudemys scripta) from Coahuila, Mexico. By John M. Legler. Pp.

73-84, pls. 9-12, 3 figures in text. August 16, 1960.

*4. Autecology of the copperhead. By Henry S. Fitch. Pp.

85-288, pls. 13-20, 26 figures in text. November 30, 1960.

5. Occurrence of the garter snake, Thamnophis sirtalis, in the Great Plains and Rocky Mountains. By Henry S. Fitch and T. Paul Maslin. Pp. 289-308, 4 figures in text.

February 10, 1961.

6. Fishes of the Wakarusa River in Kansas. By James E.

Deacon and Artie L. Metcalf. Pp. 309-322, 1 figure in text. February 10, 1961.

7. Geographic variation in the North American cyprinid fish, Hybopsis gracilis. By Leonard J. Olund and Frank B. Cross. Pp. 323-348, pls. 21-24, 2 figures in text.

February 10, 1961.

8. Descriptions of two species of frogs, genus Ptychohyla; studies of American hylid frogs, V. By William E.

Duellman. Pp. 349-357, pl. 25, 2 figures in text. April 27, 1961.

9. Fish populations, following a drought, in the Neosho and Marais des Cygnes rivers of Kansas. By James Everett Deacon. Pp. 359-427, pls. 26-30, 3 figures.

August 11, 1961. 75 cents.

10. Recent soft-sh.e.l.led turtles, of North America (family Trionychidae). By Robert G. Webb. Pp. 429-611, pls.

31-54, 24 figures in text. February 16, 1962. $2.00.

Index. Pp. 613-624.

Vol. 14. 1. Neotropical bats, from western Mexico. By Sydney Anderson. Pp. 1-8. October 24, 1960.

2. Geographic variation in the harvest mouse.

Reithrodontomys megalotis, on the central Great Plains and in adjacent regions. By J. Knox Jones, Jr., and B.

Mursaloglu. Pp. 9-27, 1 figure in text. July 24, 1961.

3. Mammals of Mesa Verde National Park, Colorado. By Sydney Anderson. Pp. 29-67, pls. 1 and 2, 3 figures in text. July 24, 1961.

4. A new subspecies of the black myotis (bat) from eastern Mexico. By E. Raymond Hall and Ticul Alvarez. Pp.

69-72, 1 figure in text. December 29, 1961.

5. North American yellow bats, "Dasypterus," and a list of the named kinds of the genus Lasiurus Gray. By E.

Raymond Hall and J. Knox Jones, Jr. Pp. 73-98, 4 figures in text. December 29, 1961.

6. Natural history of the brush mouse (Peromyscus boylii) in Kansas with description of a new subspecies. By Charles A. Long. Pp. 99-111, 1 figure in text. December 29, 1961.

7. Taxonomic status of some mice of the Peromyscus boylii group in eastern Mexico, with description of a new subspecies. By Ticul Alvarez. Pp. 113-120, 1 figure in text. December 29, 1961.

8. A new subspecies of ground squirrel (Spermophilus spilosoma) from Tamaulipas, Mexico. By Ticul Alvarez.

Pp. 121-124. March 7, 1962.

9. Taxonomic status of the free-tailed bat, Tadarida yucatanica Miller. By J. Knox Jones, Jr., and Ticul Alvarez. Pp. 125-133, 1 figure in text. March 7, 1962.

10. A new doglike carnivore, genus Cynaretus, from the Clarendonian Pliocene, of Texas. By E. Raymond Hall and Walter W. Dalquest. Pp. 135-138, 2 figures in text.

April 30, 1962.

11. A new subspecies of wood rat (Neotoma) from northeastern Mexico. By Ticul Alvarez. Pp., 139-143.

April 30, 1962.

12. Noteworthy mammals from Sinaloa, Mexico. By J. Knox Jones, Jr., Ticul Alvarez, and M. Raymond Lee. Pp.

145-159, 1 figure in text. May 18, 1962.

13. A new bat (Myotis) from Mexico. By E. Raymond Hall.

Pp. 161-164, 1 figure in text. May 21, 1962.

*14. The mammals of Veracruz. By E. Raymond Hall and Walter W. Dalquest. Pp. 165-362, 2 figures. May 20, 1963. $2.00.

15. The Recent mammals of Tamaulipas, Mexico. By Ticul Alvarez. Pp. 363-473, 5 figures in text. May 20, 1983.

$1.00.

16. A new subspecies of the fruit-eating bat, Sturnira ludovici, from western Mexico. By J. Knox Jones, Jr., and Gary L. Phillips. Pp. 475-481, 1 figure in text.

March 2, 1964.

17. Records of the fossil mammal Sinclairella, Family Apatemyidae, from the Chadronian and Orellan. By William A. Clemens. Pp. 483-491, 2 figures in text.

March 2, 1964.

18. The mammals of Wyoming. By Charles A. Long. Pp.

493-758, 82 figs. July 6, 1965, $3.00.

Index. Pp. 759-784.

(Continued on outside of back cover)

(Continued from inside back cover)

Vol. 15. 1. The amphibians and reptiles of Michoacan, Mexico. By William E. Duellman Pp. 1-148, pls. 1-6, 11 figures in text. December 20, 1961. $1.50.

2. Some reptiles and amphibians from Korea. By Robert G.

Webb, J. Knox Jones Jr., and George W. Byers: Pp.

149-173. January 31, 1962.

3. A new species of frog (genus Tomodactylus), from western Mexico. By Robert G. Webb. Pp. 175-181, 1 figure in text. March 7, 1962.

4. Type specimens of amphibians and reptiles in the Museum of Natural History, The University of Kansas. By William E. Duellman and Barbara Berg. Pp. 188-204.