HELIX. 



89 



margin with an obtuse subraarginal lamella, and the base with an oblique 

 sinuous, tooth-like fold. Greater diam. Hi, lesser lU ; height tJ mill. 



Helix auriformis, Bland, Ann. N. Y. Lye. VII, 37, fig. (1858). 



Helix auriculata, Binney, Bost. Journ. Nat. Hist, (ex parte,) pi. xis, f. 



2 (1840) ; Terr. Moll. II, IStJ (ex parte), pi. xl, f. 1 (right hand), 2. 



— Reeve, Con. Icon. 700. — Deshayes in Fee. Hist. var. minor, pi. 1, 



f. 3. 

 Helix avara, Chemnitz, ed. 2, 370 (ex parte), t. Ixv, f. 1-2. — Pfeiffer, 



Mon. Hel. Viv. I, 418.— Reeve Con. Icon. 720. 

 9 Helix sayii, Wood, Ind. Suppl. pi. vii, f. 34; ed. Hanley, 228, f. 34. — 



DeKay, N. Y. Moll. 47. 

 Dcedalochila auriformis, Tkyon, Am. Journ. Conch. Ill, 155, pi. xi, f. 1-3 



(16G7). 



From Texas to Georgia it is an extremely common species. 

 Immense beds of semi-fossil specimens are found in middle 

 Alabama. 



This species is common in American cabinets, and usually 

 labielled H. avara, or var. of H. auriculata, but it appears 

 entirely distinct. It is most nearly allied to the former, but is 

 larger, not hirsute, and has the groove in the last whirl within 

 the umbilical region like the latter. The parietal fold is some- 

 what similar to, but does not descend so far into the aperture as 

 that of H. posteUiana, but the teeth on the labrum are in form 

 and position, though more developed, rather like those of H. 

 avara. They are separated by the same deep sinus, but the 

 upper one generally without the sharp reflexed hook at its 

 termination. 



Helix postelliana, Bland. — Shell rimately perforate, above 

 slightly convex, with rib-like striae wider apart and more 

 prominent behind the aperture ; beneath, inflated, convex, 

 almost smooth, and with microscopic spiral lines : brown 

 horn-color, thin, shining, subpellucid : whirls five, gradually 

 increasing, rather convex, the last deflected and turned out- 

 wards from the preceding one, scrobiculate, constricted, 

 grooved within the umbilical region ; suture impressed ; 

 aperture obliqu*', ear-shaped, contracted ; peristome white, 

 acute, continuous, the margins joined by a tongue-shaped fold, excavated 



