VOLUME 9 



1. New Species of the Hipparion Group from the Pacific Coast and Great Basin Prov- 



inces of North America, by John C. Merriain r 10 



2. The Occurrence of OHgocene in the Contra Costa Hills of Middle California, by 



Bruce L. Clark ". .1 IOi 



3. The Epigene Profiles <>f the Desert, by Andrew C. Lawson 2." 



