Pp. 257-264, 1 figure in text. August 16, 1948.

16. A new extinct emydid turtle from the Lower Pliocene of Oklahoma. By Edwin C. Galbreath. Pp. 265-280, 1 plate.

August 16, 1948.

17. Pliocene and Pleistocene records of fossil turtles from western Kansas and Oklahoma. By Edwin C. Galbreath.

Pp. 281-284. August 16, 1948.

18. A new species of heteromyid rodent from the Middle Oligocene of northeastern Colorado with remarks on the skull. By Edwin C. Galbreath. Pp. 285-300, 2 plates.

August 16, 1948.

19. Speciation in the Brazilian spiny rats (Genus Proechimys, Family Echimyidae). By Joo Moojen. Pp. 301-406, 140 figures in text. December 10, 1948.

20. Three new beavers from Utah. By Stephen D. Durrant and Harold S. Crane. Pp. 407-417, 7 figures in text.

December 24, 1948.

21. Two new meadow mice from Michoacan, Mexico. By E. Raymond Hall. Pp. 423-427, 6 figures in text. December 24, 1948.

22. An annotated check list of the mammals of Michoacan, Mexico. By E. Raymond Hall and Bernardo Villa R.

Pp. 431-472, 2 plates, 1 figure in text. December 27, 1949.

23. Subspeciation in the kangaroo rat, Dipodomys ordii.

By Henry W. Setzer. Pp. 473-573, 27 figures in text, 7 tables. December 27, 1949.

24. Geographic range of the hooded skunk, Mephitis macroura, with description of a new subspecies from Mexico.

By E. Raymond Hall and Walter W. Dalquest. Pp. 575-580, 1 figure in text. January 20, 1950.

25. Pipistrellus cinnamomeus Miller 1902 referred to the Genus Myotis. By E. Raymond Hall and Walter W. Dalquest.

Pp. 581-590, 5 figures in text. January 20, 1950.

26. A synopsis of the American bats of the Genus Pipistrellus.

By E. Raymond Hall and Walter W. Dalquest. Pp. 591-602, 1 figure in text. January 20, 1950.

Index. Pp. 605-638.

*Vol. 2. (Complete) Mammals of Washington. By Walter W. Dalquest.

Pp. 1-444, 140 figures in text. April 9, 1948.

Vol. 3. *1. The avifauna of Micronesia, its origin, evolution, and distribution. By Rollin H. Baker. Pp. 1-359, 16 figures in text. June 12, 1951.

*2. A quant.i.tative study of the nocturnal migration of birds.

By George H. Lowery, Jr. Pp. 361-472, 47 figures in text.

June 29, 1951.

3. Phylogeny of the waxwings and allied birds. By M. Dale Arvey. Pp. 473-530, 49 figures in text, 13 tables.

October 10, 1951.

4. Birds from the state of Veracruz, Mexico. By George H.

Lowery, Jr., and Walter W. Dalquest. Pp. 531-649, 7 figures in text, 2 tables. October 10, 1951.

Index. Pp. 651-681.

*Vol. 4. (Complete) American weasels. By E. Raymond Hall. Pp. 1-466, 41 plates, 31 figures in text. December 27, 1951.

Vol. 5. 1. Preliminary survey of a Paleocene faunule from the Angels Peak area, New Mexico. By Robert W. Wilson. Pp. 1-11, 1 figure in text. February 24, 1951.

2. Two new moles (Genus Scalopus) from Mexico and Texas.

By Rollin H. Baker. Pp. 17-24. February 28, 1951.

3. Two new pocket gophers from Wyoming and Colorado.

By E. Raymond Hall and H. Gordon Montague. Pp. 25-32.

February 28, 1951.

4. Mammals obtained by Dr. Curt von Wedel from the barrier beach of Tamaulipas, Mexico. By E. Raymond Hall.

Pp. 33-47, 1 figure in text. October 1, 1951.

5. Comments on the taxonomy and geographic distribution of some North American rabbits. By E. Raymond Hall and Keith R. Kelson. Pp. 49-58. October 1, 1951.

6. Two new subspecies of Th.o.m.omys bottae from New Mexico and Colorado. By Keith R. Kelson. Pp. 59-71, 1 figure in text.

October 1, 1951.

7. A new subspecies of Microtus monta.n.u.s from Montana and comments on Microtus canicaudus Miller. By E. Raymond Hall and Keith R. Kelson. Pp. 73-79. October 1, 1951.

8. A new pocket gopher (Genus Th.o.m.omys) from eastern Colorado.

By E. Raymond Hall. Pp. 81-85. October 1, 1951.

9. Mammals taken along the Alaskan Highway. By Rollin H.

Baker. Pp. 87-117, 1 figure in text. November 28, 1951.

*10. A synopsis of the North American Lagomorpha. By E. Raymond Hall. Pp. 119-202, 68 figures in text. December 15, 1951.

11. A new pocket mouse (Genus Perognathus) from Kansas.

By E. Lendell c.o.c.krum. Pp. 203-206. December 15, 1951.

12. Mammals from Tamaulipas, Mexico. By Rollin H. Baker.

Pp. 207-218. December 15, 1951.

13. A new pocket gopher (Genus Th.o.m.omys) from Wyoming and Colorado. By E. Raymond Hall. Pp. 219-222.

December 15, 1951.

14. A new name for the Mexican red bat. By E. Raymond Hall.

Pp. 223-226. December 15, 1951.

15. Taxonomic notes on Mexican bats of the Genus Rhogeessa.

By E. Raymond Hall. Pp. 227-232. April 10, 1952.

16. Comments on the taxonomy and geographic distribution of some North American woodrats (Genus Neotoma). By Keith R.

Kelson. Pp. 233-242. April 10, 1952.

17. The subspecies of the Mexican red-bellied squirrel, Sciurus aureogaster. By Keith R. Kelson. Pp. 243-250, 1 figure in text. April 10, 1952.