514 



University of California Publications in Geology [Vol- 10 



teeth of Euceratheriiim are very similar to those of Preptoceras, and 

 isolated molars, as for example those from Hawver Cave, may per- 

 haps with equal propriety be placed in either of the two Pleistocene 

 genera of California, As noted, however, by Furlong, 23 the superior 

 molar in Preptoceras possesses a minute style which is situated in the 

 angle between the inner crescents. This style is absent in the Hawver 

 Cave teeth. 



Measurements of Teeth 



Left superior molar, no. 21468, anteroposterior diameter 27.3 mm. 



Eight superior molar, no. 21467, anteroposterior diameter a27.3 



a, approximate. 



BISON, sp. 



A number of well-worn premolar teeth are referable to an old 

 individual of Bison. In shape and size as well as in outline of enamel 

 pattern the specimens are similar to corresponding teeth of Bison 

 antiquus from Rancho La Brea. 26 In so far as indicated, the bison 

 remains from the fissure deposit are not specifically separable from 

 B. antiquus of the asphalt beds, and may represent the same type. 



Measurements of Teeth 



P 2 , no. 21465, anteroposterior diameter 19.6 mm. 



P-, no. 21465, transverse diameter 15.8 



P-, no. 21463, anteroposterior diameter 22 



P-, no. 21463, transverse diameter 22.7 



P 1 , no. 21462, anteroposterior diameter 18 



P 1 , no. 21462, transverse diameter 25.2 



SUMMARY 



A detailed study has been made of the Pleistocene fauna secured 

 from Hawver Cave. This fissure deposit is located in Eldorado 

 County, California, five miles east of Auburn and approximately 150 

 miles to the southeast of Potter Creek Cave and Samwel Cave in 

 Shasta County. 



The age of the Hawver Cave deposit is determined as Pleistocene 

 on the basis of presence in the fauna of typical Pleistocene genera, as 

 Smilodon{?) , Nothrotherium, Megalonyx(f) , Myloclon and Eucem- 

 therium. This age is indicated also by the percentage of extinct 

 species occurring in the fauna. 



25 Furlong, E. L., Preptoceras, a new ungulate from the Samwel Cave, Cali- 

 fornia, Univ. Calif. Publ., Bull. Dept. Geol., vol. 4, pp. 163-169, pis. 24-25, 1905. 



215 Chandler, A. C, A study of the skull and dentition of Bison antiquus Leidy, 

 with special reference to material from the Pacific Coast, Univ. Calif. Publ., Bull. 

 Dept. Geol., vol. 9, pp. 121-135, 1916. 



