82 HELIX-DENTELLARIA. 



H. NUXDENTICULATA Chemnitz. PL 29, figs. 39-41. 



Imperforate, globose, solid, opaque, dark chestnut brown, with a 

 light yellow peripheral line ; surface obliquely corrugated by fine, 

 close, obliquely descending wrinkles, crossed by rather irregular 

 lines of increment ; spire low, very obtuse; whorls 5, the inner not 

 convex, yellowish-brown, very minutely granulated ; last whorl 

 much dilated and gibbous on its latter half, especially beneath, con- 

 stricted behind the peripheral part of the peristome, deeply and 

 abruptly deflexed above ; aperture oblique, irregularly lunar ; peri- 

 stome flesh-colored or white, thick, convex, outer margin expanded, 

 inside bearing two strong teeth projecting into the aperture ; basal 

 margin reflexed and adnate to the base and over the umbilicus, its 

 inner edge irregularly denticulate ; terminations of peristome remote, 

 but joined by a heavy ridge of callus across the parietal wall, which 

 bears a large tongue-shaped erect process, extending a little within 

 the aperture. Alt. 20, diam. 22 mill. ; alt. 15, diam. 19 mill. 



Martinique and Guadeloupe Is. 



H. punctata BORN, Test. Mus. Gees. Vindob. p. 372, t. 14, f. 17, 18. 

 PFR. in Conchyl Cab. t. 21, f. 6, 7; Monogr. i, p. 306. H. nux- 

 denticulata CHEMNITZ, Conchyl. Cab. ix, p. 275, f. 2055, 2056 

 (1795). FER. Hist. t. 49, f. 3, 4; and of most authors. IT. hippo- 

 castaneum LAM. Journ. d'Hist. Nat. t. 42, f. 3. Chenu, III. Conch. 

 t. 10, f. 3, and of others. Dentellaria nuxdenticulata W. G. BINN. 

 Ann. N. Y. Acad Sci. iii, p. Ill (jaw and dentition). 



The name punctata Born has priority, but is used for a well- 

 known European Macularia. 



H. NUCLEOLA Rang. PI. 28, figs. 16, 17, 21. 



Imperforate, globose-depressed, solid, opaque, yellowish-chestnut 

 or light olive-brown, with two dark chestnut bands, which sometimes 

 cover all the surface but a median peripheral light line ; surface 

 shining, obliquely striate ; spire low, rounded, very obtuse ; whorls 

 5, the inner ones scarcely convex, not lighter colored than the outer ; 

 sutures linear, becoming impressed at the last whorl ; body-whorl 

 depressed, rounded or subangular at the periphery, constricted 

 behind the peristome, deflexed toward the aperture. Aperture ob- 

 lique, broad-lunar ; peristome heavy, convex, purplish or bluish ; 

 outer margin slightly expanded, basal margin broadly reflexed, 

 bearing two denticles within, the inner often obsolete ; terminations 



