HELIX. 109 



over the epidermis. From young specimens of H. buccu- 

 lenta, wliicli it resembles still more nearly, it may be 

 distinguished by the same marks. 



I formerly supposed this to be a doubtful species, but 

 it was at a time when but fe^ specimens had been pro- 

 cured, and when it was almost unknown in collections in 

 this neighborhood. I now esteem it to be as well estab- 

 lished as any other species. 



I have examined Mr. Lea's original specimen of H. 

 mitchelliana, and entertain no doubt of its specific iden- 

 tity with the present species. The lower outline figure 

 represents that shell. 



The history of this species affords an instance of the 

 disregard of European naturalists to Mr. Say. The 

 first description was published by bim in Januaiy, 1821, 

 under the name of Helix elausa ; yet a year afterwards, 

 M. Ferussac applied the same name to another American 

 species, which had also been described by Mr. Say as 

 Helix infiecta. Both of Mr. Say's descriptions are con- 

 tained in a well known Journal accessible to, and quoted 

 by them ; but notwithstanding this, the error committed 

 by M. Ferussac has been perpetuated by M. Deshayes 

 and others, down to the present time. 



6. HELIX BERLANDERIANA, MORIOAND. 

 Plate XLIX. Figdres 1, 2. 



H. testa sub-globosa, arete perforata, lucida, sub-opalina, 

 pallida, vix striata ; anfractibus quinque convexis, sutura 

 VOL. n. 28 



