70 THE NAUTILUS. 



fallax, Say:=var. tridentata, Say. 



hirsuta, Say=var. stenotrema, Fer. 



Hopetoneusis, Shutt.=var. tridentata, Say. 



inflecta, Say=var. tridentata, Say. 



introferens, Bland=var. tridentata, Say, 



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



Mullani, Bland=var. devius, Gould. 



Rugeli, Shutt.=:var. tridentata, Say. 



Salmonensis, Tryon=var. devius, Gould. 



Sanburni, W. G. B.=var. devius, Gould. 



thyroides, Say=var. albolabris. Say. 



triodontoides, Bland=var. Texasiana, Moric. 



uvulifera, Shutt.=var. auriculata. Say. 



Van TVostrandi, Bland^var. tridentata, Say. 



Wetherbyi, Bland=var. Roemeri, Pfr. 

 It would be an 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 numlier of 

 the Nautilus. 



THE SHELL-BEARING MOLLUSCA OF RHODE ISLAND. 



BY HORACE F. CARPENTER 



198.— YokUa limatula, Say., 1881. 

 Syns. : 



Nucula limatula, 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 



