92 [October, 1841. 



Memoire sur les Forameniferes de la Craie du Bassin de 

 Paris. Par M. Alcide D'Orbigny. 4to. Paris, 1841. 

 From the Author. 



Amphibia Europsea ad Systema Nostrum Vertebratorum 

 Ordinata. Auctore Carolo L. Bonaparte. 4to. 1841. From 

 the Author. 



Lamarck's Genera of Shells, with a Catalogue of Species. 

 Translated from the French by A. A. Gould, M. D. 12mo. 

 Boston, 1833. From Mr. S. S. Haldeman. 



New Species of Shells, published October 5, 1841. By S. S. 

 Haldeman. 8vo. From the Author. 



Remarks on the Abracadabra, or Dr. Hahnemann's Homoeo- 

 pathic Medicines. By William Leo Wolf, M. D. 8vo. 

 New York, 1841. From some Physicians of Philadelphia. 



Written Communications. Dr. Morton read a letter ad- 

 dressed to him by the Rev. John Bachman, of Charleston, 

 South Carolina, accompanying a communication on the Fauna 

 of North America, which was submitted to the Society for 

 publication, viz : 



"Descriptions of New Species of Quadrupeds inhabiting 

 North America. By J. J. Audubon and J. Bachman. 



Vespektilio monticola. Mountain Ba*. 



V. Vespertilione subulata brevior ; auriculis brevioribus ; tragis non ex- 

 cedentibus dimidiam longitudinem auriculae ; colore fulvo. 



Mountain Bat. Smaller than Say's Bat, (V. subulatus ;) ears shorter : 

 tragus less than half the length of the ear ; colour yellowish brown. 



Upper fore-teeth bilobate, ears moderate, naked, erect, rather broad at 

 base; tragus linear, subulate, body small ; wings long; tail projecting, a 

 line beyond the interfemoral membrane, which is slightly sprinkled with 

 hair above and beneath. 



Colour. The nose and chin are black ; ears, light brown; wing mem- 

 branes, dark brown. The whole of the fur of the body, above and beneath, 

 is from the roots of an uniform yellowish-brown colour. 



This species differs from Say's Bat, not only in colour, but in its much 

 shorter ears and tragus. The size and shape of the tragus, we have found 

 an infallible guide in our American Bats; the ears of the present species, 

 when alive, are always erect, whilst those of Say's Bat are folded backwards 

 like those of the long eared Bats Plecotus. 



Dentition : Incis. * 2, Canines, * * 

 6 11. 



