DOLIID.E. 195 



Sub-gen. volvartna, Hinds (Hj^alina, Gray, not Schum,). 



Shell subcylindrical ; spire short, obtuse ; aperture linear ; 



columella plicate anteriorly ; outer lip externally thickened, 

 forming a slight marginal varix. 



Albanyaua, Gask. micans, Petit. 



Capensis, Kraitss. neglecta, Sow. 



cylindrica, Brown. nitida. Hinds. 



Delessertiana, Reclaz. olivaeformis, Klen. 



Dunkeri, Krauss. oryza, Lara. 



fasciata, Sow. pallida, Linn. 



fauna, Sow. Philippinarum, Redf. 



fusca, Soiv. punctulata. Petit. 



fusiformis, Hinds. rubella. Sow. 



gracilis, C. B. Adams. serrata, Gask. 



Hindsiana, Petit. tfeniata, Sow. 



inflexa, Sow. triplicata, Gask. 



lactea, Kien. triticea. Lam. 



Lavalleaua, D'Orb. zonata. Lam. 



Fam. DOLIID.E. 



Teeth on lingual membrane in seven rows (3'1 3), 

 central generally toothed, lateral in three series, con- 

 verging, the inner often broad, the two outer subulate, ver- 

 satile. Mantle enclosed, the siphon recurved. Foot small. 



Operculum none. 



Shell thin, ventricose; whorls with transverse ribs; aper- 

 ture with an oblique notch in front. 



M. Deshayes notices a curious fact in the habits of 

 Dolimn, which he states swells out the foot, when it 

 desires to swim, with an enormous quantity of water, im- 

 bibed through certain pores, and in this condition pro- 

 gresses. 



