286 PROCKKDIXGS OF THE ACADEMY OF [1890. 



uiiihiiical region with a white callus which is semi-sulcate and 

 thickly foveate, lip simple, not reflected, aperture semi-orbicular. 

 Color canary yellow, lighter beneath the suture, opercle semi-orbic- 

 ulur, thin, corneous, depressed at the center, and of a silvery white- 

 ness. 



Height 4] mm., diam. 5 mm.; height of aperture 2] mm., diam. 

 of aperture 2 mm. 



Hab. Solomon Islands. Dr. Jas. C. Cox, datum (No. 192.) 



Helicina Hakodadiensis, Nobis. PI. Ill, fig. 8. 



Shell solid, orbicular, conoid depressed, apex obtuse, convex be- 

 neath and slightly carinate at the periphery. Whorls 4, compressly 

 rounded, coarsely and obliquely striate and crossed by spiral im- 

 pressed lines, umbilical region covered by a white vitreous cal- 

 lus and semi-sulcate at base, which is coarsely punctate, aperture 

 .semi-orbicular, oblique, pale red within, lip white, slightly reflected. 

 Color pale rose, mottled by irregular white blotches, opercle ab- 

 sent. 



Height 3 mm., diam. 5] mm. ; height of aperture 2 mm., diam. 

 of aperture 2 mm. 



Hab. Hakodadi, Japan. B. Schmacker, Esq., datum. 

 Helicina Dominicensis, Nobis. PI. Ill, fig. 9. 



Shell moderately thick, compressly orbicidar, apex obtuse, more 

 convex above than beneath, slightly rounded at the periphery, 

 whorls 4, with fine capillary stride, suture impressed, aperture oblique, 

 semi-orbicular, red within, lip reflected, white, umbilical callus 

 white, vitreous, thickly punctate and semi-sulcate, color reddish. 



Height 3 mm., diam. 4 mm. 



Hab. Dominique, ^Marquesas Islands. 



Obs. A. Garrett, datum (No. 74.) 



Helicina bitaeniata Nobis. PI. Ill, fig. 10. 



Shell thin, semi-orbicular, translucent, vitreous, smooth, depressly 

 conoid, apex obtuse. Whorls Al, rounded at the periphery, aper- 

 ture semi-orbicular, moderately oblique, lip thin, slightly reflected, 

 base with a white vitreous callus which is punctate, pale horn color, 

 with two pale rose colored bands, one above the periphery the other 

 near the base, visible within the aperture, opercle corneous, reddish 

 and thickly foveate. 



Height 3'. mm., diam. 6^ mm.; height of aperture 2^ mm., diam. 

 of aperture 2 nun. 



