78 [September, 1841. 



lambis, Terebra maculata, T. vittata, Oliva erythrostoma, 

 O. ventricosa. Buccinum papillosum, Murex trequeter, 

 Ranella argus, Turbo argyrostomus, Cerithium obeliscus, 

 Trochus californicus, Haliotis Crachcrodii, Meleagrina 

 margaritifera, Spondylus spathaliferus. Presented by Mr. 

 Draper. 



DONATIONS TO LIBRARY. 



Laws of the General Assembly of the Commonwealth of 

 Pennsylvania, passed in the session of 1840. 8vo. Harris- 

 burg, 1840. From Mr. Wm. S. Vaux. (This volume 

 contains the act exempting the Academy from taxation.) 



Written Communications. A letter was read from Francis 

 Markoe, Jr. Esq. acknowledging the announcement of his 

 election as a corresponding member of the Society. 



Mr. S. S. Haldeman submited " Descriptions of two new 

 Freshwater Shells." 



Amnicola attenuata. Shell very long and slender, with six 

 obliquely revolving, very convex turns, separated by a deep suture ; 

 aperture small, ovate, with the peritreme level and continuous, as 

 in Cyclostoma. Length A inch. Hab. a spring in Montgomery 

 Co. Virginia, connected with Roanoke river. 



Obs. Very like, but more slender than Cyclostoma lapidaria, 

 Say ; which I refer to this genus, as well as C. Cincinnatiensis, 

 Lea ; retaining for this species Mr. Anthony's specific name 

 Sayana, under which appellation the shells were distributed by 

 this gentleman. This substitution is necessary, because the pre- 

 viously described Paludina Cincinnatiensis, is an amnicola. Mela- 

 nia integra, Say, is an amnicola also. 



Physa globosa. Shell globose, translucent, spire very short and 

 rounded ; aperture very wide, occupying considerably more than 

 half the entire area of the shell ; fold well marked, whirls three. 

 Length i inch. Hab. mouth of Nolachucky river, attached to 

 submerged rocks, in the rapids. 



