1865.] DR. J. E. GRAY ON A NEW SPECIES OF BUSH-GOAT. 205 
other particulars the figure of the skull of the male C. altifrons, 
figured by Dr. Peters (Reise n. Mossamb. t. 38. f. 1). But that skull 
is not above half the size of the one here described; and the form 
of the core of the horns is different, the one being conical and elon- 
gate, and the other angular and converging at the tip. 
Skull of Cephalophus longiceps. 
The skull of the larger species of Cephalophi may be divided into 
two groups, according to the position of the horns, as compared with 
the frontal line. 
In some the horns are decumbent and bent back, being nearly in 
a line with the forehead, as in Cephalophus coronatus, C. sylvicul- 
trix, C. ogilbyi, C. natalensis (figured in Cat. Ungulata, B.M. t. x. 
LARC: longiceps, and C. altifrons, Peters. In others the horns 
are ascending, placed at an obtuse angle with regard to the line of 
the forehead, as in Cephalophus grimmius and C. ocularis of Peters 
(Reise nach Mossambique, Saugeth. t. 39, 40). 
The forehead of all the Cephalophi with decumbent horns is con- 
vex and rounded ; but in C. ogilbyt it is very much rounded—more 
than in any other species I know ; it is much higher than the base 
of the horn. In the species which Dr. Peters has called C. altifrons it 
does not appear to be so high as usual in the genus. In C. grimmius, 
with ascending horns, it is flat between the eyes. The following 
observation is founded on the comparison of a series of skulls of 
males :—The skulls differ in the length of the face, thus:—In C. 
natalensis the face is short ; the distance from the orbit to the upper 
end of the intermaxillary bone is shorter than the length of the in- 
termaxillary bone. In C. sylvicultrix, C. ogilbyi, and C. ocularis 
the distance above defined and the length of the intermaxillary are 
nearly equal. In ©. grimmius they are rather longer. In C. longi- 
ceps the distance from the front edge of the orbit to the tip of the 
intermaxillary is much longer than the length of the intermaxil- 
lary. 
In some skulls the nasal bones are the same length as the upper 
suture of the frontal one, as in C, natalensis, C. sylvicultriz, and C. 
ogilbyi. In C. altifrons, according to Dr. Peters’s figure, they are 
