HELIX. 225 



represent tMs species, but in point of fact representing 

 the striated shell herein described as Helix lucubrata. 

 If, therefore, the two shells are specifically distinct, as I 

 consider them, no description or figure lias been given 

 anterior to those published by me, and the name adopted 

 by me from Dr. Grifiith wnl have the prior right ; but if, 

 on the contrary, they are only varieties, both must merge 

 under Helix lucubrata, Say, the first description having 

 been pubUshed under that name in 1829. 



69. HELIX LUCUBRATA, Sat. 



Plate XXXII. 



H. testa convexa, perforata, viridi-cornea ; • anfractibus 

 quinque, regulariter striatis ; apertura transversa, expansa ; 

 umbilico parvo ; labro simplici, acuto. 



SYNONYMS AND KEFEKENCES. 



Helix lucubrata, Say, Disseminator, &c. 1S29. 



Descriptions of New Terr. & Fluv. Shells, 13. 

 PrEiFFER, Mouog. Helic. Viv. I. 98. 

 Hdix lasvigata, Feeussac, Hist. pi. 82, f. 6, 1832. 



DESCRIPTION. 



Animal. Head and superior tentacles dark blue ; 

 body and foot pearly white ; margin of foot furrowed, 

 furrows meeting over posterior termination. Caudal 

 extremity bluish above, with a gland. 



Shell somewhat convex ; epidermis greenish horn- 

 color, shining ; whorls five, rapidly enlarging, with beau- 

 voL. n. 67 



