StTPPLEMEKT. 333 



latter in the same family. The connection shown between the 

 Dkhodontidce {Gelocus) and the Cervidce {Pcdceomeryoc) by means of 

 the three above-mentioned genera is so close as to leave little doubt 

 as to the descent of the one family, through the Tragulidce, from the 

 other ; the existing genera of Tragulidce being lateral offshoots 

 from the same early stock. 



Leptomeryx evansi, Leidy -. 



Syn. Trimerodus cedrensis, Cope ^. 



This is the type and only species, and is about the size of Tragulus 

 meminna. 



Hah. North America. 



M. 2562. A fragment of the left maxilla, showing the last two 

 premolars and the first two true molars ; from the Miocene 

 of the White Eiver, Colorado, U.S.A. Less imperfect spe- 

 cimens are figured by Leidy in the ' Ancient Fauna of 

 Nebraska,' pi. xiv. 



Presented by JR. LydehTcer^ Esq., 1885. 



M. 2562 a. Tour fragments of mandibular rami with teeth ; from 

 the same deposits. /Same history. 



Genus DORCATHERIUM (pt. ii. p. 153). 



Dorcatheriuxn naui (pt. ii. p. 153). 



M. 3714. Cast of the right ramus of the mandible. Original (type) 

 from Eppelsheim : figured by Kaup in ' Oss. Toss. d. 

 Darmstadt,' pt. 5, pi. xxiii. fig. 1. 



EgeHon Collection. Purchased, 1882. 



Family DICHODONTID^ (pt. ii. p. 159). 



Genus DICHODON (pt. ii. p. 164). 



Dichodon cuspidatus (pt. ii. p. 164). 



M, 3679. Part of the right ramus of the mandible with the three 



^ Proc. Ac. Nat. Sci. Pliilad. vol. vi. p. 394 (1853, vol. dated 1854). 

 ^ Palaeontological Bulletin, No. 16, p. 8 ; see Cope, Eep. U.S. Geol. Surv. 

 Terr. p. 503 (1874), 8vo. 



