AMERICAN JOURNAL 



My Cabinet. Cabinet of George W. Tryon, Jr. 



Observations. — I know of no Helix with which this species 

 can be compared. H. cryj^toportica, Pfr., has comparatively 

 more and finer ribs, with the shell of quite a distinct form. 

 In the character of the ribs, standing out prominently on a 

 ground of a darker color, the contrast and general appearance 

 reminds one of some species of Scalaria. The nearest approach 

 of any terrestrial species with which I am acquainted, in this 

 respect, is Bulirnus Fairbanki, Pfr., from Bombay. 



The rounded whorls, circular mouth and strong ribs mark 

 a new type of the genus for America. 



