External Characters of Ruminant ArliodactyJa. 429 



In view of the above-recorded facts, the tabulation of the 

 genera of Cephalopbinaa I published in L910 (p. 876) may 

 be amplified aa follows ; — 



</. Inguinal glands absent Ouevei, 



a'. Inguinal glands present. 

 b. Inguinal glands consisting of a deep pocket ; urethral 

 canal nol prolonged aa a slender tube beyond the 

 tip of the glans of the penis ; horns backwardly 



inclined Cii>hal<>phus. 



li '. Inguinal glands consisting (if a very shallow pocket 

 or gutter-like groove ; urethral canal prolonged as 

 nder tube beyond the end of the glans of the 

 penis ; horns approaching the vertical Sylvicnpra. 



To the characters of the subfamily Cephalophinaa must be 

 added the absence of the gall-bladder in the liver. I have 

 failed to find a trace of this, structure in any one of the many 

 examples of this group I have examined, thus confirming the 

 statements of others as to tho invariable absence of this 

 hepatic sack. 



Subfamily Xeotkaqix^:. 



Of this subfamily I had only seen in l'JIO representatives 

 of two genera and species, namely Ourebia nigricaudata and 

 liaphicerus campestris, my acquaintance with the latter being 

 limited to two dried and mounted skins. Since then I have 

 seen fresh examples of two additional species of Ourebia and 

 of the two genera Nototragus and Neotragus. The two species 

 of Ourebia agree in all essential points with the one previously 

 described, and y<>t<>tragus similarly resembles Raphicerus, 

 as might be expected. But Neotragus is in many respects 

 different from the other genera referred to the Neotraginse ; 

 and if subsequent examination of the species supposed to be 

 related to Neotragus^ but assigned to the genera or subgenera 

 Hylamus and Nesotragus, shows that they are like Neotragus 

 pygmceus in the pedal glands, it may be desirable to sever 

 Ourebia, Raphicerus, and Nototragus from the Neotraginse as 

 a separate subfamily, Ourebiina?. 



Genus Ourebia, Lanrill. 



Ourebia nigricaudata, Brooke (p. 882). 



A subadult male of this species from Sierra Leone (F. W. F. 

 Jackson) agreed closely with the specimen described in 1910 

 in the structure of the pedal and preorbital glands, the secre- 

 tion from the latter being copious and black. The carpal 



