27S 



University of California. 



[Vol. 3. 



and has been referred by Leidy to an existing coyote, Canis 

 latrans Say. The second species was obtained from loose gravels 

 near Livermore Valley, Alameda County. It was represented by 

 a lower jaw which Leidy identified as Canis indianensis, a 

 form described by him previously from remains discovered in 

 the Ohio Valley. Unfortunately, the Californian type has dis- 

 appeared and we have only Leidy's figure for comparison. 



Of the three specimens described in this paper, two were 

 presented to the University of California some years ago. 

 Shortly after they were received, the descriptions and figures 

 published here were prepared by the writer. They were with- 

 held from publication as the specimens were found to represent 

 new and very peculiar types, a thorough understanding of which 

 would necessitate the acquisition of additional material. During 

 the eight years that have passed since these specimens were first 

 studied, extended investigations of the gravels have been made 

 but no new material has been discovered. As yet no very 

 productive beds have been discovered in the fresh water Tertiary 

 and Quaternary of California and the number of mammalian 

 specimens found is small. It is to be hoped that somewhere in 

 the extensive areas covered by these deposits in this state spec- 

 imens may yet be discovered which will show other portions of 

 the skeletons of these peculiar forms. 



A third specimen discussed here is referred to Leidy's Canis 

 indianensis, already described from this state. It is, however, of 

 considerable importance. Since the loss of the jaw from Alameda 

 County, it is the sole representative of the species known from 

 this region. This specimen is in the museum of the California 

 Academy of Sciences. Through the kindness of Mr. L. M. 

 Loomis, director of the museum, and of Mr. P. M. Anderson, in 

 charge of the palaeontological collections, the writer has been 

 accorded the privilege of describing and figuring it here. 



HYAENOGNATHUS PACHYODON 11. gen. and sp. 

 Pl. 28, Figs. 1 and 2. 



Generic characters. — Mandible short and massive. Alveolar 

 margins greatly flared below and Pt. Dentition s, t, ~s, s. 

 Pt and Ps small. Ps molarif orin . Pt very large, conical, 



