106 COCHLOSTYL A-CORASIA . 



Surface nearly smooth, lightly striatulate, and showing fine im- 

 pressed spiral lines under a lens. Translucent-whitish, with a nar- 

 row opaque-white band at the subacute peripheral keel. Spire low ; 

 apex obtuse; whorls 4, slightly convex, the last not descending in 

 front, convex below; aperture but little oblique, large, truncate- 

 oval ; lip thin, expanded, the columella arcuate, subvertical, very 

 broadly expanded and half surrounding the umbilicus, but not 

 covering it. Alt. 15?, greater diam. 21, lesser 17 mill. 



Guadalcanar, Solomon Islands. 



H. hunteri Cox, P. Z. S. 1871, p. 646, t. 52, f. 11. PFR., Monogr. 

 vii, p. 377. DOHRN in Conchyl. Cab., p. 583, t. 172, f. 5, 6. 



Differs from the other species of Corasia which are white and 

 subtranslucent, in having the columellar lip produced in a broad 

 plate, somewhat as in H. grata Mich. 



C. ALLISTERI Cox. Unfigured. 



Shell with a deep narrow concealed umbilicus, semiglobose, smooth, 

 transversely very finely striated with lines of growth; the whorls of 

 the apex also longitudinally finely striated, translucent; pale straw- 

 colored, ornamented above and below with numerous rather narrow 

 opaque white and clear bands ; whorls 5, rapidly increasing in size, 

 the last much inflated and obtusely carinated, not depressed in front, 

 convex above and below ; aperture ovately rounded, subangulated 

 at the periphery, showing the opaque and clear zones within ; per- 

 istome smooth and shining ; lip very broadly expanded and reflexed ; 

 margins approximate, upper attached to the carina of the body-whorl, 

 columellar broadly dilated, overhanging and concealing the um- 

 bilicus. Diam., greatest 0'98, least 0'64 ; height 0'60 of an inch. 

 (Cox.) 



Solomon Islands (Mus. Cox.) 



This beautiful species may be at once distinguished by the very 

 peculiar alternate opaque white and clear zones. Amongst a large 

 number of specimens procured, I have not found one to vary in this 

 respect. ( Cox.) 



H. allisteri Cox, P. Z. S. 1873, p. 564. 

 H. VITRACEA Ferussac. PI. 13, figs. 52, 53. 



Shell covered perforate, globose, thin, vitraceous, carinated. 

 Whorls 4J,-5, a little convex ; aperture lunate-elliptical ; peristome 

 simple, a little reflexed. (Z)/i.) 



Australia '/ 



