1915] 



Merriam: Land Mammals from Tejon Hills 



287 



versely than those noted by the writer in specimens from the Barstow 

 fauna. This tooth is nearest the type of the advanced Merychippus 

 forms of the Barstow fauna, but may be specifically distinct from any 

 Barstow species. It may be more advanced than the Barstow species. 



A small lower cheek-tooth, M x ?, no. 21566 (fig. 3), of a protohip- 

 pine species obtained on the south side of Tejon Creek by Mr. Buwalda 

 represents a type near Hipparion. The dimensions of the tooth 

 approximate those of some Merychippus forms of the Barstow fauna. 

 The type of tooth seen in the specimen may also be near that of a 

 Merychippus species of the Merychippus zone in the "Temblor" beds 

 of the North Coalinga region on the west side of the San Joaquin 

 Valley. In specimen 21566 the metaeonid-metastylid column re- 

 sembles that of Hipparion in being slightly wider anteroposterior^ 

 than in any California Merychippus species. This type is probably 

 specifically distinct from that represented by the lower tooth, no. 

 21484, found at Comanche Creek. 



MERYCODUS, sp. 



The distal portion of a metatarsus (fig. 4) from Mr. Pack's col- 

 lection obtained in the Tejon Hills is almost identical in form and 



Fig. 4. Merycodus, sp. Distal end of metatarsus, anterior side, natural size. 

 From the Tejon Hills, at the southern end of the San Joaquin Valley, California. 

 (Upper division?) 



Figs. 5a and 5b. Merycodus, sp. Proximal phalanx, natural size. Fig. 5a,' 

 lateral view; fig. 5b, superior view. From the Tejon Hills, at the southern end 

 of the San Joaquin Valley, California. (Upper division?) 



dimensions with Merycodus specimens from the Barstow Miocene and 

 could not certainly be distinguished from a form found in the Ricardo 

 beds. The Tejon Hills specimen is perhaps slightly smaller than the 

 corresponding element in the Barstow material. 



5a 



5b 



4 



