, 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 figs. August 11, 1961.

10. Recent soft-shelled turtles of North America (family
Trionychidae). By Robert G. Webb. Pp. 429-611, pls. 31-54, 24
figures in text. February 16, 1962.

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. Morsaloglu. 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.

More numbers will appear in volume 14.

Vol. 15.

1. The amphibians and reptiles of Michoacan, Mexico. By
Willi