1912] Kellogg: Pleistocene Rodents of California 



155 



GASTOE SUBAUEATUS Taylor 



Castor occurs in Samwel Cave only, and is represented by 

 three upper molars, right M 1 , left M 2 , and right M 3 . 



A new species, Castor subauratus* has recently been de- 

 scribed from the San Joaquin Valley, California, and although 



Fig. 



1. 



Castor subauratus. 



Eight M 1 , posterior view, no. 19508. 



Fig. 



2. 



Castor subauratus. 



Eight M 1 , occlusal view, no. 19508. 



Fig. 



3. 



Castor subauratus. 



Eight M 3 , occlusal view, no. 17318. 



Fig. 



4. 



Castor subauratus. 



Left M 2 , occlusal view, no. 19507. 



Fig. 



5. 



Sciurus g. fossilis, 



n. subsp. Eight lower mandible, no. 19506. 



Fig. 



6. 



Lepus a. Idamathensis. Left lower mandible, no. 9575. 







Figs. 



1 to 6 natural size. 



the specific differences do not include any points in regard to 

 the teeth as separating it from C. pacificus, the more northern 

 form, it is probable that these three molars belong to the Cali- 

 fornia species. Mr. Taylor considers C. subauratus to be a long- 

 isolated form and one which crossed the mountain barrier from 

 the north. The Shasta region is the known northern limit of the 

 species. 



CITELLUS BEECHEYI DOUGLASI (Eichardson) 

 A number of specimens of this ground-squirrel were found 

 in both Potter Creek and Samwel caves at depths of from one 

 inch to ten feet. All are lower jaws with the exception of frag- 

 ments of two skulls, found one in each of the caves. No differ- 



* Taylor, W. P., ' ' The Beaver of West Central California, ' ' Univ. Calif. 

 Publ. Zool., vol. 10, p. 167 (1912). 



