1921] Prick: Faunas of Bautista Creek and San Timoteo Canon 389 



Cliaracters. — The larger size, the relatively anteroposterior short- 

 ness of the protoeone and great transverse depth of the lakes in both 

 the moderately and mnch worn stages ; the general Pliohippus spectans- 

 like appearance. 



Description. — Specimen no. 24039 (figs. 119a-119c) is but moder- 

 ately worn and is believed to represent P-. It is of markedly greater 



119c 



Figs. 119 to 120. Pliohippus edensis, subform A, P. spectans-liiie. Figs. 119a- 

 119c, premolar, no. 24039, inner view, X occlusal view and cross section, X 1. 

 Fig. 120, referred molar, no. 23328, inner view, X %; occlusal view, X 1. Eden 

 beds, California. 



size than the premolars of the preceding section, and the protoeone 

 is proportionately smaller. The lakes are large and deep. The eon- 

 volutions in their inner borders disappear in age as seen in cross- 

 section. The cross-section suggests the referred worn molar (no. 23328, 

 fig. 120). This last tooth, though differing in actual measurements, 

 being of smaller size and more worn, strongly resembles the P. spectans 

 type described by Cope from the Rattlesnake. 



Comparative Measurements 



Pliohippus P. edensis 



edensis, subform A, P. spectans 



subform A, referred type 



Univ. Calif. Univ. Calif. specimen* 



Coll. Vert. Coll. Vert. Am. Mus. 



Pal. 24039 Pal. 23328 Cope Coll. 8183 

 type 



Anteroposterior diameter 26.8 mm. 24 mm. 27 mm. 



Transverse diameter 26.2 25 25.2 



Length of protoeone 7 7.5 7.5 



* Measurements taken from cast of type specimen. 



