1915.] Allen, American Deer of the Genus Mazama. 5945) 
Gray states later (Cat. Rumin. Mamm. Brit. Mus., 1872, p. 92, under 
Coassus superciliaris) that the type seems not to have been preserved. 
Brooke says (Proc. Zool. Soc. London, 1878, p. 926): “The type of Coassus 
auritus Gray, not having been preserved, I have omitted the name from my 
list, as without the type it will be impossible to decide with certainty upon 
what species Dr. Gray’s name was conferred.” Yet Fitzinger in 1897 
(J. c., p. 20) not only included the species but referred to it as “ Nicht nur im 
zoologischen Garten zu London, sondern auch in Lord Derby’s Menagerie 
zu Knowsley befand sich ein lebendes Weibchen dieser Art.”’ 
Coassus whitelyi Gray (Ann. and Mag. Nat. Hist. (4), XII, 1873, p. 163; 
Hand-list Edentate, Thick-skinned and Ruminant Mamm. Brit. Mus., 1873, 
p. 162, pl. xxxu, fig. 2) was based on a young skull from Conipata, Peru. 
Referred by Lydekker (Deer of All Lands, 1898, p. 305) to Cervus (Subulo) 
tschudii Wagner (probably on geographical grounds). 
Nanelaphus namby Fitzinger (Sitz. d. k. Akad. Wissens. Wien, math.- 
naturw. Cl., LX XIX, 1879, p. 32), was based on two specimens collected 
by Natterer in Matto Grosso, Brazil, one at the Fazenda Caicara, near 
Jaurt, and the other at Villa Maria, both young animals, the Caicara speci- 
men retaining the milk dentition. Doubtless referable to Mazama simplict- 
cornis. Available for the Matto Grosso form, should it prove separable 
from the (typical) Paraguay form. 
GENERAL CONSIDERATIONS. 
Coloration. As already noted (antea, p. 522), the species of Mazama may 
be separated, in a general way, into two groups on the basis of coloration, 
although the forms referable to each group vary much inter se. In the red 
group the general color varies from yellowish rufous to dark chestnut rufous, 
and in one form to dark blackish brown with only a slight rufous suffusion. 
The dark color along the midline of the shoulders and on the back of the 
neck and head varies from dull brownish to strong black, in correlation with 
the intensity of the general coloration. The legs vary in color from pale 
or dull rufous to quite intense black. The dull band of brownish (usually 
broken in the middle) behind the white chin varies from obsolescence to 
strong rufous brown. The underparts (except for certain sharply defined 
white areas, as on the buttocks, inside of the thighs, and inguinal region) 
may be uniform in tone with the flanks, or much lighter. There is consider- 
able seasonal variation, due to wear and fading, usually easily recognizable 
10f., Pelzeln, Sitz. d. k. Akad. Wissens. Wien, math.-naturw. Cl., XXXIII, 1883, 
Beiheft, p. 85). 
