OLOSIA, VOLVARIA. 47 



Section Closia, Gray. 



Spire involute ; lip thick, usually dentate within ; columella 

 heavily incrusted with callus, two lower folds of columella very 

 prominent, two superior ones not so prominent ; above them 

 there are sometimes deposited a series of false folds or transverse 

 ridges as in Gyprasa : which it resembles ; especially its dorsal 

 aspect. 



M. LARGILLIERTI, Kiener. PL 12, figs. 77, 78. 



Pale violet fawn-color or yellowish brown, more or less 

 obscurely banded and necked with yellowish white. 



Length, *75-l inch. 



Bahia, Brazil. 



M. ovum, Reeve (fig. 78\ is only an unpainted, probably faded, 

 state of this species. 



M. LILACINA, Sowb. PI. 12, fig. 80. 



Flesh-white, stained with pale lilac, with an indistinct broad 

 central band. Length, '9 inch. 



Habitat unknown. 

 M. SARDA, Kiener. PI. 12, figs. 81-83. 



Whitish, faintly three-banded with violet; lip tinged exteriorly 

 with yellowish brown. Length, '65 inch. 



Ceylon, Mauritius. 



M. Manceli, Jousseaume (fig. 83), appears to be identical with 

 this species. 



M. QUADRILINEATA, Gaskohl. PI. 12, fig. 79. 



Ash-gray, with four distant, dark revolving lines. 



Length, -8 inch. 



Habitat unknown. 

 M. CONTAMINATA, Gaskoin. 



This unfigured and unrecognized species, without assigned 

 habitat and undeterminable, appears to belong* in this group. 



Subgenus Volvaria, Lam. 



Shell subcylindrical ; spire very short or sunken ; aperture 

 narrow, anteriorly dilated ; columella sinuous in front, subflexuous, 

 obliquely truncated, and with four oblique plaits ; outer lip 

 slightly thickened without, or with only a slight marginal varix. 



A single recent species, M. pallida, is very similar to the fossil 



