242 



[February, 



Kev. M. J. Berkeley, F. L. S., and the Rev. M. A. Curtis, " On the 

 Exotic Fungi from the Schweinitzian Herbarium in the Acad. Nat. Sci. 

 of Philadelphia," was presented and referred to Dr. Zantzinger, Mr. 

 E. Durand and Dr. Bridges. 



Mr. Cassin exhibited the specimen of Scalops, described by him, 

 under the name of Scalops m.etallescens, in the paper presented this 

 evening. This specimen was collected in Oregon by the Naturalists 

 attached to the Exploring Expedition under the command of Capt. 

 Wilkes, U. S N., and is one of the most remarkable species of the 

 family to which it belongs. 



February lid. 



Vice President Bridges in the Chair. 



The Committee to which was referred the following paper by Dr. 

 Woodhouse, reported in favor of publication in the Proceedings : 



Description of a new species of Mui'set of the genus Hesperomys^ Waterkouse. 



By S. W. Woodhouse, M. D. 



Hesperomys Texana. 



CJiar. Essent. Smaller than the H. leucopus, head shorter and more blunt, 

 ears smaller and more round, brown above, and white, inclining to yellowish, 

 beneath. 



Description. Head large, blunt. Eyes prominent, and dark brown. Ears 

 large, erect, roundish, oval, blunt, sparsely covered outwardly with short ap- 

 pressed brown hairs, inwardly with grey. Thumb of fore feet a tubercle, fur- 

 nished with a long blunt nail, two middle toes the longest, subequal. Hind feet 

 furred, with the exception of the sole. Whiskers long. 



Color. Hair dark cinereous, above tipped with pale brown, and dusky, so as 

 to have rather a mottled appearance ; beneath white inclining to yellowish ; the 

 two colors, that is to say above and beneath, tolerably distinctly separated 

 from each other in a straight line. Tail above brown, beneath white ; nose 

 mixed brown and grey, or pale brown. Whiskers black and grey ; legs white on 

 their inner surface only, feet white, the hairs projecting over the nails. 



Habitat. Western Texas. 



Dimensions. 



Total length from tip of nose to root of tail, 



" " of tail, 



" of head, 

 Height of ear. 

 Breadth of ear, 

 Fore legs. 

 Hind legs. 



Observations. I procured this little animal on the Rio Grande near El Paso, 

 whilst attached to the party under the command of Captain L. Sitgreaves, U. S. 

 Topographical Engineers, on our way to explore the Zuni and Colorado rivers. 

 Of its habits I know nothing. My attention was called to this animal by Major 

 Le Conte, who has been for some time engaged in the study of the mice of our 

 country. 



The Committee on Mr. Conrad's " Synopsis of the North American 

 Naiades/' reported in favor of publication in the Proceedings : 



