212 Zoological Society. 



A. sing-sing, Gray, Cat. Mamm. Brit. Mus. 159, not Bennett. 



Inhabits W. Africa ; Gambia. Called JEquitoon by the Joliffs, 

 and Kob by the Mandingoes. 



A fine pair has been at Knowsley some years. Thinking them 

 new, I described them as A. annulipes. Mr. Ogilby has called it the 

 Nag or, but it is scarcely the Nagor of Buffon. An adult male no- 

 ticed by Mr. Ogilby as the Kob is now in the Museum of the Zoological 

 Society ; its horns, like the male at Knowsley, are much worn down. 

 They whistle like a stag. 



Buffon (H. N. xii. 219. 267. t. 32. f. 1) figures a skull with horns, 

 brought from Senegal by Adanson, under the name of Kob, which is 

 also called the Petit vache brune. Erxleben gave this figure the name 

 of A. kob, and Pennant called it the Gambian Antelope, Syn. i. 39. 

 The figures somewhat resemble the head of a half-grown male of this 

 species, but the horns are longer, and have more rings than the spe- 

 cimen in the British Museum ; but I am inclined to agree with Mr. 

 Ogilby in believing that it was intended for this species. In the Jar- 

 din des Plantes they called the Sing-Sing the Kob of Senegal ; this 

 may be a mistake for the Koba. I may remark that the horns of 

 the Koba in the same plate of Buffon are represented with more rings 

 than are mentioned in the description. 



Colonel Hamilton Smith describes and figures a male and female 

 specimen which were alive in Exeter Change, and figures the male 

 and its skull and horns under the name of A. adenota, which well 

 agrees with this species, and has the peculiar distribution of its hair ; 

 hence its name : but he says, it has " a long open suborbital slit, 

 and small black brushes on the knees ;" this I suspect must be a 

 mistake, as he himself observes no lachrymal cavity was found in the 

 skull. He might have mistaken the tuft of hair for the gland at the 

 distance at which he saw the specimens. He also (G. A. K. iv. 221) 

 described a specimen which was in Exeter Change, which he regarded 

 as the Gambian Antelope of Pennant, and calls A. forfex. His cha- 

 racters agree in most particulars with this species, but he says it had 

 "a long lachrymal sinus, and had small brushes on the knees." If 

 there was not some mistake in transcribing these descriptions, both 

 these animals should be Gazellas, but I have never seen any which 

 agreed with them. 



The young male in the British Museum shows the development of 

 the horns of these animals. The upper rings of the growing horn fall 

 off in large thick flakes as the horn increases in size beneath : this 

 explains how the extent of the smooth tapering part of the horns in- 

 creases in length as the horn grows, and how the number of rings are 

 found to be nearly the same in the various ages, and different indi- 

 viduals of the various species. Mr. Whitfield informs me that the 

 scrotum is rarely developed or dependent externally in different kinds 

 of Antelopes before they have completed their first year. 



** Horns elongate, recurved at the tip ; tail slender, end tufted. 

 2. Adenota Leche. The Leche. 

 Pale brown ; orbits, chest and beneath white ; front of legs dark 



