HELIX. 



179 



between them, and rendering the aperture almost cir- 

 cular ; a thin, -whitish callus sometimes completes the 

 union. The tooth is wanting in immature shells. 



Mr. Say's " description of this shell was published in 

 the year 1821. Lamarck's description of IT. Richardi 

 did not appear until April, 1822 ; but he quotes by 

 anticipation Ferussac, Hist. Nat. des Moll. No. 174, 

 for the specific name ; which, however, was not then 

 published in that work, but appeared in the Tableau 

 Systimatique of that author, in the earlier part of the 

 same year. The name of profunda has therefore the 

 priority, and consequently must be adopted." 



These are Mr. Say's words, extracted from his Ameri- 

 can Conchology, No. 4. 



This species seems to represent, in America, the group 

 of which H. cingulata is the type in Europe. The prin- 

 cipal difference consists in the little, tooth-like callus 

 which our shell has upon the lip, and the more numerous 

 bands. 



