HELTCID^. 43 



orbicular, more or less rugose, white, obsoletely banded ; whorls 

 4-5, the last descending in front ; aperture obliquely oblong ; 

 peristome simple, expanded, labiate within ; columellar margin 

 reflected. H. Gualtier-iana^hinn. {xcv^Qo). 50 sp. Mediterra- 

 nean region. 



Jfure/Za, Pfr., 1817. Shell not carinated at the periphery. H. 

 muralis, Mlill. 



Levantina, Kobelt, 1811. H. guttata, Olir. 11 sp. Western 

 Asia. 



Iberus (typical). Shell carinate at the periphery. H. Gval- 

 tieriana, Linn. 



Hemicycla, Swainson, 1840. (Mj^cena, Albers, 1850.) Shell 

 imperforate, giobosely depressed, rugose ; four or five whorls, 

 the last gibbous, deflected in front ; aperture obliquely oval ; 

 peristome thickened, its superior and inferior lips subparallel or 

 approaching and usually connected by a columellar callus, the 

 inferior one lamellate within. 3t sp. Canary and Cape Vei'd 

 Is. H. Saulcyi, d'Orb (xcv, 66). 



Plebecula Lowe, 1854. (Helicomela, Lowe, 1854.) Shell 

 umbilicated or narrowly perforate, subglobose, striated, hispidly 

 granulate ; whorls 5-5-j, convex, the last but little deflected 

 anteriorly ; aperture rounded; peristome simple, diffuse^ callous 

 within ; margins approaching, that of the columella dilately 

 reflexed. ^. punci^uZato, Sowb. (xcv, 61). 5 sp, Madeira. 



Leptaxis, Lowe, 1852. (Katostoma and Cr3qDtaxis, Lowe, 

 1864.) Shell thin, globose or depressly globose, striated or 

 rugose ; whorls 5-5^, the last descending, with convex base ; 

 columella straight, entering, more or less dilated below, aper- 

 ture large, rounded-lunar, or subrhombic ; peristome simple, 

 lipped within, margins approaching. H. undata, Lowe (^xcv, 68). 

 30 sp. Madeira, 



Leptaxis (restricted). Not carinate, imperforate. 



Pseudocampylaea, Pfeiflfer, 1877. Shell perforate, subcarinate. 

 H. L'owei, Fer. 



Lampadia, Albers, 1854. (Mitra, Albers, 1850.) Periphery 

 carinate, depressed. H. Webbiana, Lowe (xcv, 69). Madeira. 



DORCASiA, Gray. (Galaxias, Beck, 1837.) Shell umbilicate, 

 subglobose ; whorls convex, the last ventricose, descending at 

 the aperture; aperture generally shining within ; peristome thick, 

 expanded, reflexed, rarely simple, obtuse, margins approximating, 

 often joined by a callus, the columella dilated, reflexed, some- 

 what covering the umbilicus. II. argillacea, Per. (xcvi, 94). 

 37 sp. So. Africa, East Indies, Australia. 



HADRA, Albers, 1860. (Papuina, Albers, 1860.) 119 sp. E. 

 Indies, China, Japan, Australia. H. bipartita, Fer. 



XANTHOMELON, Albcrs, 1850. Shell striulate, globose, with a 

 yellowish epidermis ; spire small, obtusely conoidal ; whorls 4-5, 



