70 PULMONATA. 



pellucid, greenish white ; spire flat, with the apex subtle, but 

 scarcely prominent; suture impressed, indistinctly bordered; 

 whorls scarcely three, eularo-ing ra])idly, the last convex and 

 narrow beneath ; aperture large, oblique, ovate ; peristome 

 simple, straight r right margin dilated forwards, columellar mar- 

 gin strongly arched, with a slight membranaceous edge. Height 6, 

 greatest breadth 14, least breadth 10 mill. {Pfr.) 



Vitrina Keppelh, Pfr. in Z.f. M. 1853, 51 ; Mon. Suppl. 622; 



Ic. t. 6. f. 8-10. 

 Hab. New Caledonia [Capt. Keppel). 



10. Helicarion zebra. 



Shell rounded, umbilicated, depressed-convex above, more 

 convex beneath, hyaline, ornamented with obliquely wavy flame- 

 lets of white and chestnut colour ; whorls four, thinly striated 

 above; aperture rather dilated ; vmibilicus very small. Breadth 7, 

 axis 5 mill. 



Vitrina zebra, Le Guill. in Revue Zool. 1842, 136. 

 Pfr. Mon. Helic. ii. 509. 



Hab. Auckland Islands. 



11. Helicarion tenella. 



Shell small, amber-like, subperforate, conspicuously striated 

 with lines of growth ; spire rounded, apex subcentral ; whorls 

 three, convex, declining; suture channelled; apertm'e nearly 

 circular ; lip arched in front. Breadth }, axis -^^ poll. 



Vitrina tenella, Gould, Proc. Bost. Soc. 1846, 181 ; Exped. Shells, 

 1851, 11. f. 10. 



Pfr. Mon. Helic. ii. 509. 

 Hab. Sandwich Islands. 



12. Helicarion caperata. 



Shell helicoid, depressed-globose, obtusely angled at the cir- 

 cumference, thin, subo])ake, furrowed with conspicuous lines of 

 growth and oblique, branching wrinkles, especially above, pale 

 fulvous-horny, perforation covered ; spire of three and a half 

 convex whorls, rapidly increasing ; suture deep ; ajiex subcentral ; 

 aperture nearly circular ; lip simple, bent over the imibilicus ; 

 columella simulating a calhis, passing into the second spire. 

 Lat. max. ^%, alt. ^ poll. 



Vitrina caperata, Gould, Proc. Bost. Soc. 1846, 181 ; Exped. 

 Shells, 1851, 10. f. 9. 

 Pfr. Mon. Helic. ii. 509. 

 Hab. Sandwich Islands. 



