157 
Skull: basal length (c.) 6 inches, greatest breadth 3°3, orbit to muzzle 3:5. 
This subspecies is based on a female specimen referred by Gray* to ‘“‘ Cepha- 
lophus badius” ; its skull has been figured by him under that name. Thomas 
has, however, shown that the skull of this specimen differs so much from that 
of typical C. dorsalis that, in spite of its external resemblance, it should be 
looked upon as representing a distinct subspecies ; and this view we have 
accepted in the present work. Additional specimens will, however, be needed 
before its position can be satisfactorily determined. For the present, therefore, 
we publish all that is known about it, and trust that further specimens from 
different localities will clear up the precise relationship it bears to the true 
C. dorsalis, and also to its close ally C. leucogaster. 
Hab. Cameroons 
The Bay Duiker, as this Antelope has long been called, is better known 
than the species which we have last spoken of and appears to have a wider 
distribution. At the same time it varies a good deal in the colour of its 
fur, both according to age and in the various localities in which it is found. 
Gray, who was an habitual species-maker, has, as was pointed out by Sclater 
in 1869, described it under three different names, based on age-changes and 
on slight variations in colour. 
Commencing in 1846, Gray established his Cephalophus dorsalis on a 
specimen in the British Museum, which had been brought to this country 
alive by Mr. Whitfield from Sierra Leone and had died in the Surrey 
Zoological Gardens. In 1850 he figured the same species in the ‘ Knowsley 
Menagerie’ from a drawing made by Waterhouse Hawkins. This drawing 
was probably taken from living specimens in the Knowsley Collection, also 
procured by Whitfield, who was a collector employed by Lord Derby. In 
1852 Dr. Gray seems to have come to the conclusion that the animal figured 
in the ‘Knowsley Menagerie’ was not the same as the true Cephalophus 
dorsalis originally described from Mr. Whitfield’s specimen, and, accordingly, 
in his list of Ungulata Furcipeda in the British Museum, named the former 
Cephalophus badius, retaining the name Cephalophus dorsalis for the latter. 
Dr. Gray, however, did not state exactly how the two species are to be 
distinguished, and he afterwards united them under one heading. ‘The typical 
specimen of C. breviceps was described when alive in the Zoological Gardens, 
* Hand-l. Rum. B. M. p. 94 (1873). 
