Zoological Society. 225 
Deer, which has lately been obtained by him from Valparaiso, and 
is a native of South America. It evidently belongs to the genus 
Capreolus or Roebucks. 
I may observe that most of the groups into which the Deer have 
been divided are strictly geographic divisions; the only exception is 
in the Stags, or the restricted genus Cervus, one species of which is 
found in America. The following animal appears to be a similar ex- 
ample in the genus Capreolus, which has hitherto been restricted 
to species found in the Old World. 
In size it agrees with the specimens of the male Ahi or C. pygar- 
gus from Siberia in the British Museum collection, being at least 
three times as large as the usual European Roebucks; but it differs 
from that species in being much darker, in not having the white spot 
which extends over the upper part of the sides of the haunches, and 
in having the greater part of the front ot the chin and a spot on each 
side of the upper lip white, instead of the lip and chin being nearly 
black, as in that species. 
In all the characters above noted it agrees with the European Roe- 
buck, as it also does in the greater stoutness of the legs and the 
greater length of the face. Indeed I can see no difference between it 
and the European Roebuck, except in the greater size, the greater 
length of the quills, and their more distinct and broader subterminal 
yellow bands, and in the hair on the inside of the ears being whiter ; 
but in the latter character it also differs from C. pygargus. 
I think it may be distinguished by the provisional name of C. leu- 
cotis. 
Sundevall observes of C. pygargus, “‘A priori (C. Huropeus) non 
minus differt quam omnes Cervi indici inter se; hi igitur, non minus 
quam ille, distinguendi, sed rectius forsan ut mere varietates ha- 
bendi.’”’—Pecora, 61. 
I have seen six specimens of the Ural species, and they were all 
alike, and very distinct from any variety of the European Roebuck I 
have seen, especially in the form of the head and the extension of the 
white disk over the sides of the rump, forming a broad oblong white 
spot ; while in the European species it is an erect longitudinal disk 
only, occupying the back part of the haunches. 
The height at the shoulder of Lord Derby’s specimen is 38 inches. 
His Lordship’s correspondent states, “It was brought to Valparaiso 
by Don Benjamin Munoz, a Commodore in the Chilian Navy. The 
animal was shot by one of the Chileno officers about twenty leagues 
*from Port Famine in the Straits of Magellan. The Indians assured 
the officer that there was another similar kind of Deer there, but 
quite white. He did not see any of them, but the other kind (C. leu- 
cotis) did not seem uncommon.” 
2. On THE Genus Brapypus or Linnzus. By Jonn Epwarp 
Gray, Esa., F.R.S. erc. 
Illiger, and afterwards F. Cuvier, divided the Linnean genus Bra- 
dypus into two, according to the number of the claws and the absence 
or presence of the canine, and the form of the crown of the grinders, 
Ann. & Mag. N. Hist. Ser, 2, Vol.y, 16 
