156 BULLETIN OF THE 
Metatarsal-l'V;; Tength.</10? #20) 7 6 aaa oe ene See 
ae de = eee Cage Ge ee 
Proximal phalanx, digit IV, length | 5M ee RIS reek as 
BE = “ IV., width proximal end seeks eas eel eae 
S ee feo W .p letigth ? oi aioe a eee eee 
me = 61) OV, width proximaliendy ©. 2 0 901d 
Entelodon (Elotherium) Mortoni, Leidy. Represented by several skulls 
in good preservation, one of which is particularly interesting as showing the 
milk dentition. This will be fully described in our final paper. 
HYOPOTAMIDA. 
Hyopotamus americanus, Leidy. Represented by fragments of lower 
jaws with molar teeth. 
CAMELIDA. 
Poebrotherium Wilsoni, Leidy. Two skulls, one of which exhibits the 
milk dentition, represents this species. 
TRAGULIDA. 
Leptomeryx Evansi, Leidy. Riitimeyer* has recently questioned the 
propriety of referring this genus to the chevrotains, and considers it more 
allied to the Camelide. In consequence of this opinion from such a distin- 
tinguished source, we have carefully examined the dentition and skeleton of the 
genus, and are now in position to give a nearly complete account of it, which 
will be done in the final paper. Here we need only record the conclusion 
reached, that Leptomeryz, though exhibiting several points of divergence from 
the modern genera of the family, is nevertheless a true traguline. We thus 
reach a different conclusion from Riitimeyer on this subject, and agree with 
Schlosser.t+ 
GENUS INCERTA SHDIS. 
Hypisodus minimus, Cope. This minute ruminant is the earliest known 
hypsodont ae spud in America. Professor Cope gives the dental formula 
as I. 2, C.2, Pm. ?, M. 3; and states that “in the mandibular series the six 
een io canines, and two first premolars form an uninterrupted series of 
ten subequal teeth, and are followed by a long diastema.”{ The genus has 
hitherto been known only from the dentition, but there is fortunately in this 
* Abh. d. schweiz. pal. Gesell., Bd. X. p. 98. 
+ Morph. Jahrb., Bd. XII. p. 75. 
t U.S. Geol. and Geogr. Surv. Terr., 1873, p. 501. 
