308 AMERICAN JOURNAL 



HYGROMIA, Risso. 

 1. Hygromia rufescens, Pennant. 



Plate 5, figure 1. 

 Depressed, subglobose, subaugnlate ; spire depressed coni- 

 cal ; whorls 6, somewhat convex, brownish, the last with a 

 white band on the angulate periphery ; not descending at the 

 aperture, which is ovately lunar, slightly reflected over the 

 rather large umbilicus. 



Diam. 11, altitude 6 mill. 



Montreal, Canada East, (J. F. Whiteaves.) 

 A common European species, introduced as above. 



2. Hygromia hispida, Linnreus. 



Plate 5, figure 3. 

 Rather depressed, moderately urabilicate, corneous, covered 

 with short, hispid hairs ; whorls 5-6, somewhat convex, nar- 

 row, slowly increasing ; aperture semilunar, labiate within. 



Diam. 10, altitude 5J mill. 



Canada, Nova Scotia, Massachusetts. (Introduced from 

 Europe.) 



H. porcina, Say, a species described, evidently, from imma- 

 ture specimens, is now referred co this species. 



3. Hygromia jejuna, Say. 



Plate 5, figure 3. 



Subglobose, spire prominent, suture impressed ; whorls 5, 

 the last ample, stria? scarcely visible ; mouth moderate, semi- 

 circular ; lip expanded, white, (the whorl grooved behind it,) 

 internally ribbed or margined ; umbilicus small, base of shell 

 convex. Light yellow, sparingly hirsute. 



Diam, 8, height 6 mill. 



Georgia, Florida, Alabama. 



I agree with Messrs. Binney and Bland in regarding this spe- 

 cies, described from immature specimens, by Say, as identical 

 with H. Mohiliana, Lea. Mr. Lea states that H. Mohiliana has 

 a refiected lip, which at first sight, mature specimens do appear 

 to have, caused by the external constriction, and the great thick- 

 ening within. 



