AMERICAN JOURNAL 



AURICULINiE. 



Genera. 



Alexia, Leach. Ovate or oval, pointed, thin ; aperture ovate, 

 narrow, the lip broadly rounded and entire at the base ; parie- 

 tal wall with transverse laminae ; outer lip expanded, thickened 

 within, and sometimes toothed. 



Carychium, Miiller. Pupiform, very thin, transparent, minute ; 

 aperture suboval, columella generally folded, parietal wall 

 with one or two teeth ; lip reflected. 



ALEXIA. 



1. Alexia myosotis, Draparnaud. 



Plate 18, figures 1, 2. 



Oval-elongate, thin, smooth and shining ; spire produced, apex 

 acute, suture distinct ; whorls 7-8, slightly convex, the last 

 about three-fourths of the total length of the shell ; aperture 

 long and narrow, lip thin, sometimes slightly dentate-ridged 

 within, appressed at the base and slightly reflected over the mi- 

 nute perforated umbilicus. There is a sharp transverse tooth on 

 the parietal wall, and a smaller one above it ; columella folded. 

 Dark horn color, the sutures narrowly banded with red. 



Length 8, diam. 4 mill. 



Sea coast, New England to New York. 



CARYCHIUM. 

 1. Carychium exiguum, Say. 



Plate 18, figure 3. 



Oval-elongate, white, translucent, shining ; spire long, apex 

 obtuse ; whorls 5 or 6, convex, very oblique : aperture oval, 

 white, columella plaited in the middle, and slightly folded also 

 near the base ; lip thick, reflected ; umbilicus perforated. 



Length 1*6, diam. *6 mill. 



Northern, Middle and Western States, Arkansas, Texas. 



