1870.] ANATOMY OF THE PRONGBUCK. 339 
family. Still I am far from the opinion that it will long remain in 
solitary grandeur ; for I am convinced that its more aberraat features 
are but bridges, the further connecting end of which temporarily 
appears hazy to us from our present circumscribed point of view. 
I append such characters (see also Gray and Turner) of the limited 
group in question as at present appear to me reliable from the 
known data. I coincide with Messrs. Sclater and Gray as to the 
family value of the periodically deciduous horns, but do not agree 
with the former authority (A. N. H. p. 403) in recognizing absence 
of false hoofs as peculiar to the Giraffe and Prongbuck. Dr. Gray 
explicitly states of the Steinbok, “ False hoofs none”? (Cat. Mam. 
Brit. Mus. “ Furcipeda,” 1852, p. 71); and specimens which I have 
examined enable me to corroborate this assertion. 
Family ANT1LocaPRID&, Sclater. 
Horns hollow, forked, and periodically deciduous. 
Dentition.—I. =. C. S. P.M. 3 (or G42). M. 53 
32 (or 362). 
Genus ANTILOCAPRA, Gray. 
Horns in ¢ and Q, supraorbital; core osseous and cancellated ; 
sheath semicorneous, with agglutinated hairs. False hoofs none. 
Cutaneous glands caprine; crumen absent. Nose ovine, hairy. 
Skull cervine in form ; no suborbital depression ; fissure wide, length- 
ened ; supraorbital foramen large; nasals furcate, widest poste- 
riorly ; orbit slightly elevated above face ; masseteric ridge low ; 
auditory bullae moderate, compressed, angular ; supraoccipital per- 
pendicular and concave ; basioccipital tubercles abortive ; styloid en- 
sheathed ; glenoideum convex. Mandibular angle widely rounded. 
Appendicular skeleton relatively slender. A gall-bladder. Larynx 
without internal pouching; and thyroid cartilages not prominent. 
Cowper’s glands absent; prostate bifid. Incisors subequal, sloping ; 
molars without supplemental lobes. 
Hab. California. 
3. OBSERVATIONS ON EXTERIOR Potnts. 
The outward zoclogical characters of the Prongbuck have been 
accurately commented on by C. Hamilton Smith*, Richardson +, 
Gray t, Audubon and Bachman§, Cassin||, and others, and good 
figures of the animal and of the horns given by several of the above 
writers. The talented pencil of Mr. Wolf has also delineated the 
Society’s specimen while it lived in the Gardens (see P. Z. S. 1867, 
pl. xvi1.). Stuffed skins of the horned male and female and of the 
* Trans. Linn. Soe. vol. xiii. p. 13, tab. 2. 
t Loe. cit. p. 266, pl. 21. 
t Knowsley Menagerie, 19. 
§ Quadrupeds of N. America, vol. ii. p. 493, pl. Ixxvii. 
| U.S. Explor. Exped. vol. viii. p. 667 (1853-56). 
