HELIX. 63 



H. DERBESIANA, Crosse. PI. 11, figs. 2-4. 



Widely umbilicated, rather thin, with impressed, close, longi- 

 tudinal striae, light fulvous corneous ; whorls 4^, moderately 

 increasing, the last rounded, base planate, suture impressed ; 

 aperture with two parietal lamellae, a shining corneous tooth on 

 the base, two within the outer margin. Diam. 1'75 mill. 



New Caledonia. 

 H. CONTORTA, Fer. PI. 12, figs. 8-10. 



Widely umbilicated, thin, fragile, striate, slightly pilose, yel- 

 lowish, with radiating chestnut-colored flames ; whorls 4^, con- 

 vex ; aperture with two parallel parietal lamellae, and five acute 

 teeth within the right margin. Diam. 4 mill. 



Sandwich Islands. 



H. intercarinata, Mighels, is a S3 T non}-m. 



H. HYSTRTCELLA, Pfr. (unfigured). Sandwich Islands. 



H. ANALOGICA, Pease (unfigured). Marquisas. 



H. VERECUNDA, Pease (unfigured). Marquisas. 



H SEXLAMELLATA, Pfr. PI. 12, figS. 11-13. 



Very narrowly perforate, thin, regularly costulate, yellowish, 

 tessellated with chestnut-colored maculations; whorls 6, convex, 

 narrow, base planulate; aperture with six acute elevated lamellae, 

 and some intermediate smaller obsolete ones. Diam. 3 - 25 mill. 



Gambier Islands. 



. H. DECEMPLICATA, MoUSSOn. 



Moderately umbilicated, strongly striate costulate, white or 

 giayish with angulated chestnut-colored fasciations ; whorls 

 5^-6, moderately increasing, rather narrow, more convex below; 

 aperture with ten lamellae, four of them parietal, of which the 

 three upper ones are longest, six in the base and palate. 



Diam. 2 mill. 



Ellice Is. 



Unfigured. 



H. MULTILAMELLATA, GaiTCtt. PL 12, figS. 14-16. 



Deeply, widely umbilicated, thin, subpellucid, closely, lightly, 

 lamellarly costate, costae slighter and closer below, corneous, 

 tessellated with chestnut above only, suture deeply impressed ; 

 whorls 6J, convex, turgid above, slowly increasing; aperture 



