1888.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 419 



which it dips down, so that the nasal bones are more curved than those 

 of G. virginianus. The skull is much deeper in front of the eyes in G 

 clavatus than in G. virginianus; the eyes are larger, the lachrymal bone 

 also larger and its free margin more convex, while the lachrymal pit is 

 shallower. The orbital processes of the frontal and malar, forming the 

 back of the orbital ring, are much the broadest in G. virginianus, and are 

 more transverse. 



The pedicels of the antlers are directed upwards much more in G 

 clavatus than in G. virginianus. The tube of the exterior auditory meatus 

 is much larger in the former than in the latter, and extends beyond the 

 superlying ridge of the squamosal so that it is plainly seen upon looking 

 down upon the skull from above. The tube of the internal meatus is 

 also prolonged m G. clavatus and ends in a sharp point. 



ANTLERS. 



The antlers of young males of G. clavatus are simple, slightly curved 

 spikes. The burr is small and moderately rugose. In a young individ- 

 ual from Tehuantepec, no. 9442, and in no. 14212 the antlers are more or 

 less triangular in section. In the adult males, like no. 13038 from Costa 

 Rica, the antlers are slightly lyrate, considerably compressed laterally 

 and sharply pointed. The burr, though broad, is in some cases not 

 distinctly marked off from the beam, and the rugosities extend up the 

 anterior surface of the latter along the basal two-thirds in antlers which 

 are little worn. The right antler of no. 13038 is deformed, the beam 

 being bent over backwards and downwards, so that the tip is on a line 

 with the burr. 



In no. 13040 the antlers are abnormal ; the beams are straight, slen- 

 der, and smooth, and are distinctly marked off from the burr, somewhat 

 as in the Roebuck (Gapreolus). In no. 14212 the antlers are of typical 

 form, but the upper half has been worn perfectly smooth by rubbing. 



DISCUSSION OP THE AFFINITIES OF C. CLAVATUS. 



Were it not for the difference in age among the specimens now before 

 me, it might be thought that they were merely the young of some 

 known species with branched antlers. That such is not the case be- 

 comes evident upon examination of the skulls. In the largest male 

 skulls the teeth are those of the second or permanent set, and the 

 crowns of the same are well worn. Furthermore, the sutures of the 

 base of the skull are obliterated by anchylosis and the pedicels of the 

 antlers are much enlarged. There can be no doubt that this is the 

 skull of an adult individual. 



