ONTSCIA. 281 



(7. Grayi, A. Ad. (fig. 16), is said to be thinner and more 

 ventricose, more finely grooved, the spire less acute, outer lip 

 not so much thickened and inflexed, and plicate, not crenate 

 internally. I suspect that it is a synonym ; and probably the 

 next species is at most only a variety. 



C. BARBUDENSIS, Higgins and Marrat. PI. 10, fig. 17. 



Ovate, light yellowish brown, with longitudinal light chestnut 

 flames ; indistinctly spirally striate, decussated towards the lip 

 and varix. Differs from C. striata in the plications of the inner 

 lip being confined to the anterior portion, in the striations, which 

 are not crenulated above, and in its flamed color pattern. 



Length, 2-75 inches. 



M. of Barbuda, W. I. 



A single empty shell dredged in fifteen fathoms. Possibly 

 only a variety of C. striata. 



Genus ONISCIA, Sowb., 1824. 

 Section 1. ONISCIA, sensu stricto. 



O. ONISCUS, Linn. PI. 10, figs. 18, 19. 



With three spiral, tuberculated ribs, and a number of spiral 

 raised lines between them, the ribs cut by revolving impressed 

 lines ; columellar callus minutely tuberculate, outer lip denticu- 

 lated within ; whitish, dotted and spotted with chestnut or choco- 

 late, ihe dots sometimes approaching blue-black, lip white. 



Length, 1-1 '25 inches. 



West Indies. 



0. triseriata, and perhaps 0. quadriseriata, Menke, are syno- 

 nyms. 



Var. LAMARCKI, Desh. PI. 10, fig. 19. 



Columellar callus rose-pink, the granules upon it white, outer 

 lip often peppered with chestnut spots. 



It is Gyprsea conoidea of Scopoli. 



0. TUBERCULOSA, Sowb. PI. 4, figs. 68, 69. 



Whorls encircled by five rows of large blunt tubercles and 

 numerous intermediate ridges; columellar lip finely granulated, 

 outer lip somewhat contracted in the middle, dentate within ; 



