378 UNIVALVE SHELLS 



LYMNEUS. Lam. 



L. *hnmilis. Shell ovate-conic, thin, translucent, 

 with slight wrinkles ; volutions nearly six, convex, 

 terminal one very minute; suture well indented; 

 aperture about equal in length to the spire; labium 

 with an obvious plate of calcareous deposit ; a distinct 

 and rather open umbilical aperture; colour pale red- 

 dish-white or yellowish- white. 



Total length seven-twentieths. 



Inhabits South Carolina. 



Of a dozen specimens sent me by Mr. Elliott, none 

 exceeded the limit here assigned to the species. It 

 differs much from any other species I have seen : a 

 variety of it, sometimes quite black, was found by Dr. 

 M'Euen at Oswego, on the Susquehannah. 



It may be useful here to remark that, in conse- 

 quence of a typographical error in the first part of 

 the second volume of this work, the species above 

 described may be confounded with the desidiosus. 

 The length of that shell is erroneously stated to be 

 seven-twentieths of an inch, instead of seven-tenths, 



its true length. 



PALUBINA. Lam. 



P. *grana. Shell conic-ovate ; whorls not percepti- 

 bly wrinkled, convex; suture deeply impressed ; 

 aperture orbicular, hardly angulated above ; labium 

 with the superior edge appressed to the surface of the 



