no.1619. | HORNS OF THE AMERICAN ANTELOPE—LYON. 399 
Antelope as compared with the hair of the other ruminants is peculiar 
In possessing markedly denticulate cells in the medulla.* When 
the osteology of the Bovide is better known, it 1s probable that the: 
American Antelope will be found to possess certain peculiarities 
of structure not found elsewhere in the family, but, so far as our 
present knowledge goes, it has no peculiarities that are not found 
to a greater or less extent in other members of the family. 
BIBLIOGRAPHY. 
The following list contains the references to the original articles on the 
subject of the annual shedding of the horns of the American Antelope that 
have come to my notice: 
1851. AUDUBON, J. J. and BACHMAN, J.—[Remarks on the supposed shedding 
of the horns of the Antelopes. ] 
Viviparous Quadrupeds of North America, II, p. 189. 
The authors deny the possibility of the horns being shed. 
1858. CAssIN, JoHN.—[Doctor Marsh’s observation on the horns of the Ante- 
lope. | 
United States Exploring Expedition, Mammalogy and Ornithology, 
“JO OR, 
Cassin gives this quotation from the notes of Dr. Charles Pickering: 
‘Doctor Marsh assures me that the horns of this animal are shed 
annually like those of the deer.” 
18638. WEINLAND, D. F.—[ Editorial note. ] 
Der zoologische Garten, IV, p. 225. 
On the casting of a cow’s horn by natural causes mentions a like 
case observed in the American Antelope. 
1864. Martin, L.—Die Hornbildung bei der Mazama-Antelope. 
Der zoologische Garten, V, 1864, pp. 254—256. 
Describes the structure of the growing horn, but evidently not aware 
of its annual shedding. 
1865. BarTLeTT, A. D.—Remarks upon the affinities of the Prongbuck (An- 
tilocapra americana). 
Proc. Zool. Soe. London, 1865, pp. 718-725, figs. 14. 
Describes the actual shedding of the horns of a living specimen in 
the possession of the London Zoological Society. 
1866. CANFIELD, Corzerrt A.—On the habits of the Prongbuck (Antilocapra 
americana) and the periodical shedding of its horns. Publication of 
a letter written at Monterey, California, September 10, 1858, addressed 
to S. I. Baird, Secretary, Smithsonian Institution. 
Proc. Zool. Soe. London, 1866, pp. 105-110. 
A very complete and careful account of the growth and annual 
shedding of the horns of the American Antelope. 
1869. Hays, W. J.—The Prong-horn Antelope. 
American Naturalist, II, pp. 181-188, four figures on page 132, and 
figs. 1 and 2 on Plate 38. 
A careful account based on four years’ observations of a living 
Specimen, with illustrations of mature and newly formed horns. 
* Proc. Zool. Soc. London, 1870, pp. 340-342, fig. 1, p. 341. 
