ET 
inhabiting the United States. 391 
specimen which Į have seen is an imperfect one in 
the cabinet of Mr. Lea. It is impossible to decide 
from a single specimen, whether it be the young of 
the present species, which is probable, or is entitled 
to be considered a distinct species. The original 
specific name plicata being preoccupied in this genus, 
I have I Mr. T s second name, fatigiata. 
27. HELIX SEPTEMVOLVA. 
Plate XIX. fig. 4. 
H. testa orbiculari, planulata, umbilicatà, corned ; anfractibus nu- 
merosis, obliqué et acuté striatis; aperturá ab axe remotá, sub-orbicu- * 
lari, marginibus connexis; columellà unilamellatà; labro albido, 
margine reflexo. : | 
| Synonyms axo Rrrrnrxcrs, | 
Polygyra septemvólva, Say. Journ. A. N. S. Phil, 
I. 278. Nich. Encyc., Am. edit., Vol. IV. 
Helix septemvólva, Férussac. - Hist. Nat. des Moll. 
Pl. 11., fig. 6. 
Wood. Index Test. Sup. Pl. vu, fe. 14. 
Deshayes. Encye. Méth., Vers, 11. 208. — 
Helix planórbula, Lamarck. Anim. sans Vert., 2d 
edit., Il. 67. 
DESCRIPTION. 
Wididat, Brownish, tentacule darker, eyes Black; 
foot narrow, thin, semi-transparent, receiving its 
color in some degree from the substance on which 
it is placed ; —_ less than twice the "Wm of 
the shell. 
