HELIX. 



159 



Moquin-Tanclon figures the jaw of a French Fig. 274. 



specimen as slightly arcuate ; ends rounded, some- /<"( iTTpfN 



what attenuated ; anterior surface with numerous ^^"^ "^ 



ribs, denticulating the concave margin. neiix hispida. 



Helix rufescens, Pennant. —Shell umbilicated, subglobose-de- 

 pressed, subcariiiate, striate, pale reddish ; spire moderately elevated ; 

 whirls six, rather convex, the last banded with white, not 

 deflected anteriorly ; aperture ovate-lunar ; peristome spread- 

 ing, thickened with wliite at some distance within, the colu- 

 mellar margin somewhat reflected. Greater diam. 11, lesser 

 10, height 6 mill. 



Helix rufescensi, Pennant, &c. &c. — Pfeiffek, Mon. Hel. 



Viv. 1, 141. 

 Hyijromia rufescens, Tryon, Am. Journ. Conch. II, 301, pi. 



V, f. 1 (18G6). 



Germany, England, and other European countries. 

 Also found at Quebec, probably introduced from England. 



Helix Ijerlaiidieriana, Moricand. — Shell perforated, globose 

 thin and translucid, scarcely striated, shining, and with a somewhat 

 silken or opaline lustre, pale yellowish-green, sometimes nearly colorless 

 and generally having a faint, narrow, brownish band around 

 the posterior third of the last whirl ; spire consisting of five 

 well rounded whirls, separated by a deeply impressed suture, 

 the last whirl broadly rounded at the periphery ; contracted 

 at the aperture, which is small, crescentic, with a white, 

 polished, roundly reflexed peristome, presenting a sharp, 

 inner edge to the interior ; the peristome is somewhat angu- 

 lar near its posterior junction, and at this part the shell is 

 thickened witliin with callus, and is opaque white ; base 

 rounded, and perforated by a minute umbilicus. Greater 

 diam. 13, lesser 10 ; height 8 mill. 



Helix herlandieriana, Moricand, Mem. de S. Phys. et d'Hist. 

 Nat. de Geneve, VI, .537, pi. i, f. 1 (1833).— De.«hayes 

 in Lam. An. sans Vert. VIII, 133; ed. 3, III, 316.— Leipy, T. M. IJ. 

 S. I, 255, pi. viii, f. 11 (1851), an.it.— Binney, Terr. Moll. II, lOP, 

 pi. xlix, f. 1.— W. G. Binney, Terr. Moll. IV, pi. ixxvii, f. 22.— 



