slope of northern Alaska. By James W. Bee.
Pp. 163-211, pls. 9-10, 1 figure in text. March 12, 1958.

6. The wood rats of Colorado: distribution and ecology. By Robert B.
Finley, Jr. Pp. 213-552, 34 plates, 8 figures in text, 35 tables.
November 7, 1958.

7. Home ranges and movements of the eastern cottontail in Kansas. By
Donald W. Janes. Pp. 553-572, 4 plates, 3 figures in text. May 4, 1959.

8. Natural history of the salamander. Aneides hardyi. By Richard F.
Johnston and Schad Gerhard. Pp. 573-585. October 8, 1959.

9. A new subspecies of lizard, Cnemidophorus sacki, from Michoacan,
Mexico. By William E. Duellman. Pp. 587-598, 2 figures in text. May 2,
1960.

10. A taxonomic study of the Middle American Snake, Pituophis deppei. By
William E. Duellman. Pp. 599-612, 1 plate, 1 figure in text. May 2,
1960.

Index Pp. 611-626.

Vol. 11. Nos. 1-10 and index. Pp. 1-703, 1958-1960.

Vol. 12. 1. Functional morphology of three bats: Eumops, Myotis,
Macrotus. By Terry A. Vaughan. Pp. 1-153, 4 plates, 24 figures in text,
July 8, 1959.

2. The ancestry of modern Amphibia: a review of the evidence. By
Theodore H. Eaton, Jr. Pp. 155-180, 10 figures in text. July 10, 1959.

3. The baculum in microtine rodents. By Sydney Anderson. Pp. 181-218, 49
figures in text. February 19, 1960.

4. A new order of fishlike Amphibia from the Pennsylvanian of Kansas. By
Theodore H. Eaton, Jr., and Peggy Lou Stewart. Pp. 217-240, 12 figures
in text. May 2, 1960.

More numbers will appear in volume 12.

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
figs. August 16, 1960.

3. A new subspecies of the slider turtle (Pseudemys scripta) from
Coahuila, Mexico. By John M. Legler. Pp. 73-84, pis. 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