1896.] NATURAL SCIENCES OF PHILADELPHIA. 393 



with reservation that it might be found to pertain to a feline animal, 

 must be referred here. The superior sectorial is peculiar in the 

 small indication of protocone as in the Smilodons. 



DIPLARTHRA. 



Cariacus laevicornis sp. nov. 



A series of superior molars of the right side lacking the last one, 

 represents this species. There Avere obtained at about the same 

 time the basal parts of the antlers of two deer of the same size, 

 which I suspect to belong to this species. There are various bones 

 of the skeleton of probably the same. 



The true molars have internal basal columns, and the internal 

 crescents send backward and outward processes into the lakes, as 

 in the existing North American species of the genus. The molars 

 are of the size of those of C. virginianus, but the premolars are 

 smaller. The first and second are especially reduced in anteropos- 

 terior diameter, and while the third is larger than these, its form is 

 different from that of the corresponding tooth in any species of this 

 genus or of Coassus. The anteroposterior diameter of the crown 

 does not exceed the transverse, and there is no ridge of the external 

 face such as is present in all the Cervi, but only a slight convexity. 

 This ridge is present, but indistinct in the other premolars. It is very 

 strong on the paracone of the true molars, but weak on the meta- 

 coue. The horns of all the crescents are well developed. The width 

 of the base of the crowns of the true molars is greater anteriorly 

 than posteriorly. There are no processes entering the lakes of the 

 premolars such as are usual in the species of Cariacus. 



Diameters of Pm. 1 

 Diameters of M. 1 

 Diameters of M. 2 



Measurements. m. ni. 



I anteroposterior ; 11 



I transverse ; 12 



f anteroposterior ; 15 



I transverse ; 16 



[anteroposterior; 16 



\ transverse ; 16.5 



The fragments of horns both include the bur. This is not very 

 prominent, and the beam is quite smooth. There are indications of 

 tines, but they are broken off at the bases. In the shorter fragment 

 a tine is given off on the internal side, but it is broken off near the 

 base, and the beam beyond its base is also lost. In the second frag- 

 ment the position corresponding to the internal tine is split away 

 26 



