216 HELIX. 



type is rather globulose, the last whorl comparatively inflated, there 

 occur with it forms almost angulate, and others actually carinated." 



(Mme. Paulucci.) 



Sardinia. 



The synonymy includes, according to Mme. Paulucci, H. mag- 

 nettii Cantraine (non magnettii Mabille) and H. carce Kobelt (non 

 carcje Cantraine). 



The following form is described by the Marchesa Paulucci as a 

 variety of H. hospitans, which is considered by her a species distinct 

 from H. serpentina, although connected with the latter by transition 

 forms. 



Var. ALABASTRIXA Paulucci. PI. 61, figs. 17-19. 



" Differs from the type by the more globose, more solid shell ; the 

 last whorl less dilated ; the brown umbilical and parietal maculation 

 wanting ; columellar margin thick, alabastrine ; aperture small." 



Diam. 20, alt. 14 mill. 



Another form inhabiting Cape St. Elias, has been called by Mme 

 Paulucci mutation (or variety) porphydica. Its differential char- 

 acters are found in the entire absence or great reduction of the spot 

 at the insertion of the columella, and the coloration of the surface* 

 which consists of small crowded maculations, which frequently have 

 a tendency toward violaceous, instead of brown. 



Subspecies CAR.E Cantraine. PI. 64, figs. 9, 10. 



Imperforate, orbiculate-convex, somewhat depressed, smooth, shin- 

 ing, yellowish marbled and vermicula'te with dirty white, ornament- 

 ed with five brown interrupted zones ; spire prominent but subplane ; 

 aperture ovate-lunate, white, as wide as high ; peristome reflexed ; 

 umbilical callosity bordered yellowish. Corsica; Sard! //in. 



H. halmyris Mabille is synonymous. 



Var. ADJACIENSIS Paulucci. PL 64, figs. 11-13. 



Smaller, more globose, spire elevated, umbilical tract with a brown 

 spot, columellar and parietal margins brown. 



Diam. 21, alt. lo-j mill. 



Subspecies CENESTINENSIS Crosse et Debeaux. PL 60, figs. 94, !)">. 

 Imperforate, turbinate-depressed, somewhat solid, slightly shin- 

 ing, scarcely striate, whitish, encircled by spiral rather wide regular 

 deep chestnut zones, variegated with white ; spire subdepressed, 

 apex obtuse, smooth, pale violet; suture impressed; whorls 4 a, 



