HELIX. 



81 



ing a subacute angle with the basal margin, on which is one broad tubercle. 

 Greater diam. 10, lesser 13 ; height 7.] mill. 



Polygyra auriculata, Say, Nich. Encycl. 3d Am. ed. (1819; ; Journ. Phila. 

 Acad. I, 277 (1818) ; Binney's ed. 10. 



Helix auriculata, Fekussac, Hist. pi. 1, f. 4 (1822). — Binney, Bost. Journ. 

 Nat. Hist. HI, 384 (ex parte), pi. xix, f. 1 (1840), excl. syn. ;' Terr. 

 Moll. II, 186, pi. xl, f. 1 (left hand).— Leidy, T. M, U. S. I, 255, pi. 

 ix, f. 5, 6 (1851), auat.— DeKay, N. Y. Moll. 47, pi. iii, f. 28 (1843). 

 — Pfeiffeu, Mon. Hel. Viv. I, 417; IV, 318, excl. var. (1853).— 

 Chemnitz, ed. II, 371, t. Ixv, f. 3, 4. — Deshayes in Per. Hist. 76 

 (excl. var.), pi. 1, f. 4; in Lam. VIII, 112; ed. 3, III, 308.— Reeve, 

 Con. Icon. no. 700, excl. fig. (1852).— Bland, Ann. N. Y. Lye. VII, 

 26, fig. (1858).— W. G. Binney, Terr. Moll. IV, 73. 



Dcedalochila auriculata, Tryon, Am. Journ. Conch. Ill, 157, pi. xi, f. 13, 

 14 (1867). 



St. Augustine, Florida. • 



H. auriculata may be distinguished from the allied species by 

 its larger size, the greater development of the several parts of its 

 curious aperture, and especially by the sudden outward deflexure 

 of the central part of the labrum, which has a deep scrobiculation 

 behind it, corresponding with the upper tooth within the aper- 

 ture. The portion of the labium extending from the inferior 

 angle of the parietal intruded tooth is erect, and more elevated 

 than in any other of the species. 



Lingual membrane with — rows of 22 — 1 — 22 teeth each ; 



Fiff. 158. 



«HWillMPi^«^^^^ 



ffiwissas 



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Lingual dt'ulitiuu of Ihlix a.n-ivukd". [Lkidy.] 



centrals tricuspid, the side cusps very bhort ; laterals of the same 

 shape but bicuspid ; uncini with two or more sharp points. 



Helix llVllBifera. Siiuttleworth. — Shell rimately perforated, flat 

 above, inflated below, striated, reddish horn-color or brownish, rather solid, 

 shining ; whirls five, slowly increasing, narrow, the last abruptly deflected 



