External Characters of Ruminant Artiodactyla. 433 



Ourebia, Raphicerus, and other genera referred to the Neo- 

 traginae, and serves to connect the latter in a measure with 

 the Oephalophina?. In the Cephalophinse, however, the row 

 of secreting pores is arranged in a definite longitudinal 

 series forming a streak upon the face. Probably in Neo- 

 tragus the gland represents an earlier stage in the evolution 

 of the gland both in the Cephalophinae and the other genera 

 of the Neotraginse. The relatively greater size of the 

 rhinarium also, in my opinion, marks Neotragus as more 

 primitive than Ourebia or Raphicerus, and brings it into line 

 with the Cephalophinpe. -In a measure also the pedal glands 

 of Seotragus serve to link the Oephalophina with Ourebia 

 and Raphicerus. 



There was no trace of inguinal glands, and there were two 

 pairs of mamma?. 



The pedal glands were well and equally developed on both 

 front and hind feet. Each gland consisted of a capacious 

 and deep pouch occupying the greater part of the space 

 between the phalanges and opening into the hairy inter- 

 digital space by a small circular orifice, the lower rim 

 of which was formed by the upturned edge of the fold of 

 integument tying the heels together, and the upper rim by 

 the closely tolded integument of the front of the pastern. 

 Thus the orifice was set higher up within the interdigital 

 space than in the Cephalophines, and in Madoqua and 

 Dorcotragus. The sack of the gland was sparsely hairy ; 

 the interdigital space was covered with long hairs, but the 

 inferior apex of the triangular heef-tie was naked as in the 

 Cephalophines (fig. A). 



The genera of this subfamily known to me may be distin- 

 guished by their cutaneous glands and other external features 



as follows : — 



a. Pedal glands opening into the interdigital space by a 



small circular orifice ; no invagination of the surface 



of the preorbital gland Neotragus. 



b. Pedal glands openiug into the interdigital space by a 



lung cleft ; surface of the preorbital gland invaginated. 

 a'. Pedal glands overlapped in front and above by a long 

 fold of integument ; no inguinal glands. 



a a . False hoots absent Raphicerus, 



b u . False hoofs present Notoiragus. 



b' . Pedal glands an open cleft not overlapped in front 

 above by a fold of integument ; inguinal glands 

 present Ourebia. 



Ann. & Mag. N. Hist. Ser. 9. Vol i. 29 



