176 



0. 0. Marsh — Miocene Artiodactyles 



There were in all forty-four teeth. Three incisors were 

 present on each side above, and there is a diastema behind the 

 last one. The upper canine was large, and directed well 

 forward and outward. There is no diastema behind the 

 canine, and the four premolars form with the true molars a 

 continuous series. The first and second premolars are secant, 

 the third is subtriangular in outline, while the fourth has its 

 crown composed of one external cusp and one internal cone. 

 The upper molars conform strictly to the pattern of the type 

 specimen on which the genus was based. A figure of this 

 tooth and one of the corresponding molar of the present 

 specimen are given below, natural size, in cuts 1 and 2. 



Figure 1. — Last upper molar of Heptacodon cwrtus, Marsh ; leftside; seen from 



below. 

 Figure 2. — The same tooth of Heptacodon gibbiceps, Marsh. 

 Both figures are natural size. 



The posterior nares open opposite the middle of the last 

 upper molars. The anterior palatine foramina appear to be 

 confluent, forming together a heart-shaped aperture, which 

 may in part be due to injury. 



This type specimen indicates an animal about the size of a 

 wild boar. 



Elomeryx armdtus, gen. nov. 



The specimen described in the last number of this Journal 

 as Heptacodon armatus proves on examination to belong to a 

 distinct genus, which may be called Elomeryx. Of this genus, 

 two species are now known. Some of the main characters are 

 as follows : — 



The skull is elongate, with the facial part quite narrow. 

 The frontal region between the orbits is flat or even concave. 

 The orbits are very small, and not closed behind. There is no 

 lachrymal fossa. The anterior narial opening is large, and the 

 snout broad. 



