110 



[June, 



very strikingly from the figures 

 and descriptions of Mr. Lonsdale. 

 In Michelin's Iconographie, plates 

 78 and 79, there is a species figured 

 from Claiborne, which resembles 

 this, but is not the same. In the 

 cuts annexed fig. 1 represents a 

 highly magnified view of the ex- 

 ternal surface, with its foramina 

 and numerous indented points. 

 Fig. 2 represents the dorsal sur- 

 face; and fig. 3 represents the 

 size of the specimen, with its na- 

 tural appearance. 



Eschar a Claihornevsis. Folia- 

 ceous ; cells ovate, constricted 

 _ near the middle, boundary slightly 



raised, thickened and 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 Sciurtis, 

 By S. W. WooDHousE, M. D. 



SciuRDs DORSALis, nobis. 



Description. Ears 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, with a 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 SJcin% 



Length from nose to root of tail, about 



From heel to point of longest nail, 



Height of ears externally, .... 



" ' to end of hair, . 



Breadth of ear, ....... 



From ear to point of nose, about 



Tail vertebrre, about ..... 



" to end of fur, about ..... 



Remarls. 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 the receipt 

 of my New Mexican collections (which contain some fine specimens, with their 

 crania,) I will give a fuller description. 



