252 HELIX. 



conic, apex obtuse, nucleus very large ; whorls 4*, regularly increas- 

 ing, sutures regularly impressed, somewhat crenulated ; last whorl 

 inflated, anteriorly descending; aperture lunate-<val ; peristome 

 labiate with white within, columellar and basal margins thickened, 

 columellar margin callous, subdentate ; parietal wall with a light 

 callus. Diam. 32-34, alt. 26-28 mill. (Kobelf). 



Adscharia. 



Allied to vulgaris by the large obtuse apex, to nordmanni by the 

 form, coloration, etc. 



H. PRASIXATA Roth, 1855. PL 56, figs. 14, 15. 



Imperforate, turbinate-globose, striate, thin, greenish, with a de- 

 ciduous epidermis, very obsoletely and narrowly fasciate ; spire short, 

 acute; whorls 4}, the upper subplane, last ample globular: aper- 

 ture slightly oblique, lunate-oval, livid within, sometimes pearly; 

 peristome simple, the margins joined by a callus, right margin 

 straight, acute, the columella scarcely arcuate, thickened, adnate. 

 ^Rotti). Diam. 30, alt. 31 mill. 



Jerusalem. 



Differs from the following species in the stronger striatioii, the 

 last whorl flattened above, giving the shell a conic form ; the aper- 

 ture is smaller, the columellar callus much more developed ; the 

 coloration is greenish, with slight traces of bands, especially upon 

 the upper whorls ; the aperture is brownish-yellow within, without 

 trace of bands. 



H. CAVATA Mousson. PI. 69, figs. 32,33. 



Imperforate, globose-conic, solid, whitish, with light chestnut 

 bands which are more or less suffused over the whole surface, mark< 

 in an oblique direction (at right angles to the rather coarse irreguhu 

 stria3 of increment,) with short, narrow clear-grayish marks, denseb 

 but obsoletely spirally striate (under a lens) ; spire conoid, ape: 

 obtuse smooth ; suture moderately impressed ; whorls 4, moderatel; 

 convex, the last rapidly widening, slightly descending anteriorly ; 

 aperture oval-lunate, slightly oblique, brownish white within ; peri- 

 stome simple, ends scarcely converging, columellar margin slightly 

 straightened, expanded, reflexed and closely adnate only in the 

 immediate vicinity of the umbilicus, white ; parietal callus very 

 slight, white. Diam. 30, alt. 30 mill. 



The above description is drawn from a specimen corresponding 

 with the type figured by Kobelt. The oblique clear-grayish marks 



