i*i Tin: NALTIIA'.S. 



fallax, Say=var. trideutata, Say. 



hirsuta, Say=var. stenotrema, F6r. 



Hopetoneusis, Shutt.=var. trideutata, Say. 



inflecta, Say=:var. trideutata, Say. 



introferens, Blaud=var. trideutata, Say. 



Mooreana, W. G. B.=^var. Texasiana, Moric. 



Mullaui, Bland=var. devius, Gould. 



Rugeli, Shutt.=var. trideutata, Say. 



Salmouensis, Tryou=var. devius, Gould. 

 ^ Sanburui, W. G. B.=var. devius, Gould. 



tliyroides, Say=var. albolabris, Say. 



triodoutoides, Bland=var. Texasiaua, Moric. 



uvulifera, Shutt.=:var. auriculata. Say. 



Vau "Xostrandi, Blaud:=var. trideutata. Say. 



Wetherbyi, Blaud;=;var. Roemeri, Pfr. 

 It would be au excellent thing, if those members of the Associa- 

 tion, who are interested in American Helices, would communicate 

 with the Secretary, giving their opinion upon the proposed changes 

 of Mr. Hemphill. The Communications would afford a basis for 

 comparing notes and obtaining a concensus of opinion upon the sub- 

 ject, which would make an interesting article in the next number of 

 the Xautilus. 



THE SHELL-BEARING MOLLTJSCA OF RHODE ISLAND. 



BY HORACE F. CARPEXTF.R 



198.— Yoldia Umntuhi, Say.. 1831. 

 Syns. : 



Nucala Iwiatula, Say, Gld., DeKay, Con., Sby., Migh., etc. 



Leda limatula, Stimp., S. I. Smith. 



Yoldia limatula, Modern authors. 



Shell transversely ovate, thin and fragile, translucent ; posterior 

 end lengthened and narrowed to a rostrum or snout ; beaks nearly 

 central, not prominent ; surface smooth and shining with minute 

 lines of growth ; epidermis very glossy, light green with lighter and 



