1010 MALAYSIAN LAND AND FRESHWATER MOLLUSCA, 



E. HUNGERFORDIANA, voii Moll. Jour. As. Soc. Bengal, I.e. 

 p. 301. 



Bukit Pondok, Perak. 



Family VITRINEA. 



3. ViTRiNA, Draparnaud, 1801. Tabl. pp. 33, 98. 



Shell dextral, depressed or sub-globose, very thin, pellucid, with 

 a very large last whorl ; no umbilicus, columella spiral ; aperture 

 large, oblique semi-lunar, without teeth ; peristome thin, acute, 

 not continuous. 



Animal long, like a slug, and too large for the shell, tail very 

 short ; mantle reflected over the shell-margin with posterior right 

 lobe; radula 100 rows of 75 ; marginal teeth with a single long 

 curved apex. 



ViTRiNA NUCLEOLA, Stol. Jour. As. Soc. Beng. XL. pi. 4, 

 fig. 12 ; Pfr. Nomencl. Hel. Viv. p. 28, No. 45. 



Penang ; Prince of Wales Island ; Straits of Malacca. 



4. Helicarion, Ferussac, (1821), Tabl. Syst. des Animaux Mol- 

 lusques, p. XXXI. and Voy. de Freycinet. 



Shell heliciform, round oval, thin, fragile, covered with a very 

 thin periostraca, spire short, whorls few, the last much enlarged, 

 oblong triangular ; peristome simple, acute. 



Animal like Vitrina, but the foot is truncate at its posterior 

 extremity, with a caudal gland like Avion. 



Helicarion permollis, Stol. (as Vitrina) Jour. As. Soc. 

 Beng. XLII. pi. 1, fig. 11. = Vitrina permollis, Pfr. Mon. Hel. 

 VII. p. 10. 



Penang. 



H. borneensis (Vitrina), Pfr. Mon. Hel. IV. p. 793 ; Nov. 

 Conch. I. pi. 28, figs. 10-12. 

 Borneo. 



