Fig. 3. 



Animal of 

 Alexia myosotis. 



Jaw of 

 Alexia myosotisJ 



LAND AND FRESII-WATER SHELLS OF N. A. [PART IL 



ALEXIA, (Leacu), Gray. 



Fig. 2. Foot simple beneath, without a transverse 



groove. 



Javf narrow, slightly arcuate, 

 extremities but little attenuat- 

 ed, striae obsolete, scarcely any 

 median projection. Lingual 

 dentition, see p. 1, Fig. 1. 



Shell oblong-ovate, thin, spire pointed ; last whirl large, 

 rounded at base ; aperture rather broad, oval, acuminating ; 

 parietal wall furnished with from one to five tuberculous laminae ; 

 columellar fold oblique ; peristome expanded, armed with teeth, 

 or thickened within. 



But one species is known to inhabit North America. Most of 

 the few foreign species inhabit the coasts of the Mediterranean, 

 though the genus is represented in South America and the "West 

 Indies. 



Fig. 4. 



Alexia myosotis, Draparnaod. — Shell elongate-oval, tliin, semi- 

 transparent, smooth and shining ; dark horn-color, with a narrow reddish 

 sutural line ; spire produced with an acute apex ; suture 

 distinctly impressed ; whirls from seven to eight, the upper 

 ones rather convex, the last one elliptically ovate, equalling 

 five-sevenths of the shell's length ; aperture suhvertical, about 

 four-sevenths the length of the shell ; peristome somewhat 

 expanded and thickened, sometimes furnished with tooth- 

 like folds on its inner side ; its basal termination aj^pressed 

 to the shell, slightly reflected over a minute perforation, and 

 turning upwards till it blends with the columellar fold, which 

 winds into the aperture ; the parietal wall is famished with 

 a white, transverse, thin, and sharp denticle, and a second 

 smaller, much less prominent one, placed above it. Greatest diameter 4, 

 length 8 millimetres. 



Auricula myosotis, Draparnahd, &c. 



Auricula denticulata, Gould, Invert, of Mass. 199, f. 129 (excl. Voluta 

 denticulata, Mont, et syn. suls.) (1841), not of Montfort. 



' From Moquin-Tandon. 



