PAGE 



No. 22. New Anchitheriine Horses from the Tertiary of the Great Basin 



Area, by John C. Merriam 419 



No. 23. New Protohippine Horses from Tertiary Beds on the Western 



Border of the Mohave Desert, by John C. Merriam 435 



No. 24. Pleistocene Beds at Manix in the Eastern Mohave Desert Region, 



by John P. Buwalda 443 



No. 25. The Problem of Aquatic Adaptation in the Carnivora, as Illus- 

 trated in the Osteology and Evolution of the Sea-Otter, by 

 Walter P. Taylor 465 



Index 497 



Errata 504 



