External Characters of Ruminant Arttodactyla. 371 



gland clearly represents one of the anterior pair present in 

 Redunca. This very interesting fact shows that in Adenota 

 representatives of the posterior pair of inguinal glands seen 

 in Redunca are retained, whereas Eleolragas retains the 

 horaologues of the anterior pair of Redunca, 



Genus Kobus, Smith. 



Kobus defassa, Riippell (p. 916). 



In 1910 I was unable to publish reliable information as to 

 the cutaneous glands of any species of the genus Kobus, 

 having only the dried skin of the head of K. defassa and 

 dried feet of K. maria for examination. Since that date I 

 have been able to examine au adult male and female of 

 K. defassa and an adult male hybrid between K. defassa and 

 K. ellipsiprymnus . 



Preorbital gland. — Although I was unable in 1910 to 

 discover a trace of this gland on the dried head-skin of 

 K. defassa, I suggested the probability of the existence of a 

 gland resembling that of Adenota kob. This suggestion, 

 however, very clearly furnished no justification for 

 Mr. Lydekker stating, on my authority, that rudimentary 

 face-glands are present in the genus (Cat. Ung. Mamm. 

 pp. 199 & 225, 1914). Fresh material proved my guess to 

 be erroneous. Kobus resembles Eleotragus and Redunca in 

 having no preorbital glands, as Owen long ago stated. 



Tlie rhinarium (fig. 2, A, B) was described by Mr. Ly- 

 dekker as "normal." By this epithet he clearly meant 

 unlike that of Pelea and Eleotragus. But, as a matter of 

 fact, there are certain features about the rhinarium of 

 Kobus which, according to my conception, are distinctly 

 abnormal in the sense that, within the limits of the Reduncinae, 

 they are peculiar to the genera Kobus and Adenota, the 

 rhinarium which most nearly approaches the normal in the 

 Reduncinae being found in Redunca. In Kobus the anterior 

 surface of the rhinarium is bilobate, owing to the presence 

 of a wide median depression up which the median groove of 

 the philtrum extends as high as the summit of the anterior 

 portion of the nares. There is also a wide area of naked 

 skin passing beneath the nostrils to their posterior extremity 

 laterally. Finally, on the dorsal side the hair of the summit 

 of the muzzle encroaches as an angular field to a point 

 nearly on a level with the anterior extremities of the nostrils, 

 and on each side of this field the upper rim of the nostrils is 

 elevated. The encroachment of this hair gives a biconvex 



27* 



