with Two Neiv Species. 



289 



Cope's referred specimen, "S. tapirimis" 6 may belong 

 to Homogalax cf. H. primcevus. It is, in my opinion, not 

 of Systemodon. Likewise the specimen referred to H. 

 tapirinus by Wortman is clearly not of that species. 



There is no doubt a close relationship between all these 

 genera, including Hyracotherium and the early horses. 

 Homogalax is separated from these allies by the total 

 absence of a diastema, the lack of distinct tubercles on the 

 cross lophs of the molars, and the general peculiar shape 

 of the molars themselves. 



Homogalax primcevus (Wortman) is the genoholotype, 

 from the Wasatch beds. The two new species made in the 

 pages following are from the Bridger and Uinta, thus the 

 three forms represent the lower, middle and upper Eocene 

 respectively. 



Al 



Homogalax oridgeresis, sp. nov. 



Cat. No. 12563, Y. P. M. Eocene (Bridger), Twin Buttes, 

 (Figs. 1-2.) 



Wyoming. 



725 63 TYPE 

 Y. P. M. 



Fig. 1. — Homogalax bridgerensis, sp. nov. Holotype. Eight maxillary 

 with molars, premolars, and canine. Note especially the absence of a dias- 

 tema, the oblong M 3 , subqnadrate M 1 - 2 , and the narrower inner side of P 3 . 

 Nat. size. 



This interesting type came to the Peabody Museum in 

 separate shipments in 1874. It bears two distinct labels 

 .and was thought to be two individuals. Now it is found 

 that the mandibular rami, accession No. 610, fit the maxil- 

 laries, No. 655, and furthermore, a small fragment of one 

 of the latter was actually associated with the rami. 



This new species is nearest H. primcevus (Wortman), 

 but differs from it in the narrower first upper molar, in 



E. D. Cope, Kept. U. S. Geol. Surv. Terr., pp. 618-624, pi. 56, fig. 1, 1884- 



