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been deceived by size, and been led to place the subgenus Tragela- 
phus under his genus Antilope, and the others under his genus I)a- 
malis ; even availing himself of stature, and in the case of the Cou- 
dou, of a white streak over the eyes, to help out the meagre distinc¬ 
tions. In associating the Nyl-Ghau with these animals, Mr. Gray 
has even allowed colour and marking to deceive him, for in this ani¬ 
mal the horns are not even spiral; but in another respect the charac¬ 
ters assigned to his Strepsicerece agree with the Nyl-Ghau, and not 
with the others, which certainly have no suborbital sinus, nor have 
any of them an ovine muzzle, by which Mr. Gray distinguishes the 
larger genera from the Tragelaphus. In these latter points Major 
Smith is correct. 
I will now proceed to the “Antelopes of the Desert” of Mr. Gray, 
a very well-marked, natural group, consisting of two distinct genera, 
which have usually been widely separated. Mr. Blyth, however, in 
the translation of Cuvier’s ‘Animal Kingdom,’ hints at their affinity, 
and Mr. Waterhouse informs me that he has long held that opinion. 
Indeed he has placed the species next each other in the Catalogue of 
the Society’s Museum. 
Alcelaphus. 
A large deep impression before the orbit, but no fissure ; the mas¬ 
seteric ridge not extending high; the bones of the face lengthened 
downwards and forwards, and the occiput also prolonged and drawn 
downwards ; the auditory bulla large and prominent, enclosing a 
large rounded space for the attachment of the stylohyal bone ; the 
basioccipital tubercles high and sharp, the groove between them nar¬ 
row in front, wide behind, with a flat space between the occipital con¬ 
dyles ; the median incisors expanded at their summits; the molars 
rather small, narrow, and without supplemental lobes, showing, when 
somewhat worn, a pit in the middle. 
Horns placed high, ringed at the base, with double flexures more 
or less marked. 
Hab. Africa. 
A. bubalis. A. lunatus. 
A. Senegalensis. A. pygargus. 
A. caama. 
I have seen skulls of the three last-named. 
Mr. Gray calls a portion of this genus “ Boselaphus,” doubtless 
intending Alcelaphus of De Blainville, which being antecedent to 
Major Smith’s name Acronotus , should certainly be adopted. The 
genus is a very natural one, and the characters by which Mr. Gray 
proposes to divide it into two, are by no means sufficient. The last- 
mentioned species, A. pygargus, has usually been placed among the 
Gazelles, where it was left by Major Smith and by Mr. Blyth, who 
speaks of it as leading “ through A. Caama, Bubalis, &c. to the 
Gnus.” Mr. Waterhouse, who in the Catalogue of the Society’s Mu¬ 
seum uses the generic name Antilope throughout, places this species 
