Speciation and Evolution of the Pygmy Mice, Genus Baiomys

by Robert L. Packard

Fig. 2. Occlusal views of molars. × 13.

A.	B. taylori analogous, subadult, female, No. 28102 KU, 4 km. ENE Tlalmanalco, 2290 meters, Estado de México. Right, upper molars.
B.	B. musculus musculus, subadult, male, No. 45456 USNM, Colima, Colima, México. Left, upper molars.
A'.	B. taylori analogous, subadult, female, No. 28102 KU 4 km. ENE Tlalmanalco, 2290 meters, Estado de México. Left, lower molars.
B'.	B. musculus musculus, subadult, male, No. 45456 USNM, Colima, Colima, México. Right, lower molars.

The largest single collection of pygmy mice is in the University of Kansas Museum of Natural History, and, unless otherwise indicated, specimens cited in the taxonomic accounts beyond are there.

I am indebted to the following named institutions and persons for making specimens available for study:

American Museum of Natural History, G. G. Goodwin and R. G. VanGelder.

Carnegie Museum, J. K. Doutt.

California Academy of Sciences, Robert T. Orr.

Chicago Natural History Museum, Phillip H. Hershkovitz.