110 (JUNE, 
\ zZ very strikingly from the figures 
E a= and descriptions of Mr. Lonsdale. 
In Michelin’s Iconographie, plates 
. 78 and 79, there is aspecies figured 
from Claiborne! which resembles 
this, but is not the same. In the 
cuts annexed fig. 1 represents a 
a highly magnified view of the ex- 
zs ternal surface, with its foramina 
and numerous indented points. 
2 Fig. 2 represents the dorsal sur- 
face; and fig. 3 represents the 
size of the specimen, with its na- 
tural appearance. 
Eschara Clatbornensis.—Folia- 
ceous; cells ovate, constricted 
— near the middle, boundary slightly 
raised, thickened ail: smooth, mouth rounded at both ends and larger at the 
upper one; a small round foramen at the lower end of each larger foramen ; 
surface between the foramina with numerous irregular pits; dorsal separation 
of opposed layers perfect, vesicle rather large, oblong, with the angles rounded. 
The Committee on a paper by Dr. Woodhouse, describing a new 
species of Sciurus, reported in favor of publication in the Proceedings. 
Description of a New Species of Sciurus. 
By 8S. W. Woopuouse, M. D. 
ScIURUS DORSALIS, nobis. 
Description.—Kars large and broad, tufted with long black gray hairs. General 
color above dark gray, with the exception of the dorsal line and a band extend- 
ing along the external base or hind part of the ear, which is of a rich ferruginous 
brown color; beneath white, with the exception of the perineum, which is 
gray; cheeks grayish white; tail very large and broad, gray above, witha broad 
white margin, and white beneath. 
Fur long, compact and soft; claws long, very strong and much curved, of a 
black color, with the exception of their points which are light and almost trans- 
parent; whiskers very long and black; iris dark brown. 
Dimensions of Dried Shine 
Inches. 
Length from nose to root of tail, about 5 . ‘ : : 13 
From heel to point of longest nail, : 5 . : : 2 8-i0ths. 
Height of Baie ese, : , : : : ° 5 1 3-10ths. 
Ss to end ofhair,- .*.: °. : : ‘ 2 8-10ths. 
Breadth of ear, 6 3 s . : : < 1 
From ear to point of nose, about : A : : 5 : 1 7-10ths. 
Tail vertebra, about : : : 3 : 5 : 8 
“to end of fur, about . : 5 : ; : Giclee web 
Remarks.—This beautiful squirrel I procured whilst attached to the expedition 
under the command of Capt. L. Sitgreaves, Topographical Engineer U. S. Army, 
exploring the Zuni and the Great and Little Colorado rivers of the West, in the 
month of October, 1851, in the San Francisco Mountain, New Mexico, where I 
found it quite abundant, after leaving which, I did not see it again. On thereceipt 
of my New Mexican collections (which contain some fine specimens, with their 
crania,) I will give a fuller description. 
