OF CONCHOLOGY. l4t 



Collection Mus. Comp. Zoology, Cambridge, Mass. 



Observations. — May be compared with G. Virginica, Say, 

 which it resembles somewhat in form and coloring, bat it is 

 altogether of a more solid texture and more robust ; it also has 

 a broader, darker, and more distinct band round the whorls ; 

 the whorls are also less convex and more angulated. I know 

 of no other shell with which it is likely to be confounded. 

 The lines of growth are well defined, and on the body whorl 

 become varicose. 



