Mr. J. E. Gray on some Species of Ceplialophus. 163 



The genus may be divided into sections by the shape and length 

 of the ears. 



I. The ears elongate, nearly as long as the head, acute ; horns 

 elongate, slender ; forehead flat. 



I. C. mergens. 2. C. Campbellise. 



II. Ears moderate, half as long as head, rather acute ; horns short, 



3. C. coronatus. 



III. The ears short, not half as long as the head, rounded at the end; 



horns short. 



t Black, white dorsal spot, no eye streak. 



4. C. sylvicultrix. 



ft Fulvous, black dorsal streak, no eye streak, 



5. C. Ogilbii. 6. C. dorsalis. 



ftf Fulvous or black, no eye streak, 

 7, C. niger. 8. C. natalensis. 9. C. rufilatus. 

 tttt Gray brown, with a pale eye streak to base of the horns. 



* Fur one-coloured, hair uniform, 

 10. C. Maxwellii. 



** Fur one-coloured, hair black and gray intermixed. 



II. C. monticola. 12. C. melanorheus. 



*** Fur grisled, hair yellow rayed. 

 13. C. punctulatus. 



Professor Sundevall has in his specific characters laid some 

 stress on the direction of the lacrymal streak, but I find on com- 

 paring different specimens of the same species that little reliance 

 can be placed on this character, in stuffed specimens at least ; for 

 the direction of the streak is altered according as the skin of the 

 face is more or less stretched. 



1. The Duyker or Duyker Boc, Cephalophus mergens. Antelope 

 mergens, Blainv. Bull. Soc. Phil. 1817; H. Smith, G. A. K. v. 

 264; Licht. Saugth. t. 11 ; Harris, W. A. Afr. t. 15. A. nic- 

 titans, Thunb. Mem. Petersb. iii. 312. A. Burchellii, H. Smith, 

 Griffith, A. K. v. 262. A. Ptoox, H. Smith, Griffith, A. K. v. 

 265? A.platous, H.Smith, G. A. K.v. 266. Moschus Grimmia, 

 Linn. 



Yellowish brown, grayish in winter ; hair yellowish, with black- 

 ish tip ; forehead yellowish bay ; chin, throat, abdomen, inside of 

 ears and under side of face white ; feet, streak on the nose, up 

 the legs, and upper part of tail black ; ears elongate, nearly as 



N2 



