﻿V A N I K R 0. 



Plate I. 



Genus VANIKORO, Quoy et Gaimard. 

 Testa subglobosa, plennnque alba, cancellata vel decnssata, 

 epidermide temd induta, perforata, umbilicata, 

 umbilico in canalem desinenti; margine aperturoB 

 simplici. Operculum corncum unguicnlatuw, non- 

 spirale. 

 Shell subglobose, generally wliito, canccllatcfl or de- 

 cussated, covered with a thin ejnJermis, per- 

 forated, umbilicus ending in a canal ; margin of 

 the aperture simple. Operculum horny, unguicu- 

 late, non-spiral. 

 SynoMjma. SIekkia, Gray. Wakica, Kccluz. 



The greater part of the species now known were 

 described by Kecluz in the I^roceedings of the 

 Zoological Society for 1813, many of them being from 

 specimens in the late Mr. Cuming's collection. A few 

 species have been subsequently discovered. The home 

 of the genus seems to be the Pacific, particularly south- 

 wards. 



Species 1. (Fig. a, b, Mus. Brit.) 



Vanikoi'.o can'CELLata. Van. tes/d lutd, paliiht, o-a.?- 

 siilsctdd, cosds crmcentricis obliquis, suhlaminatis, 

 extantihus ct liris teimibus spiralibus cancellata ; 

 aperturd lata, columella arcuatd, cana/i am/ustato, 

 eloiKjato ; spird brevissmd, depressd, epidermide 

 croced. 



The cascell.\tei) Vanikouo. Shell broad patulate, 

 rather thick, cancellated with oblique, rather 

 laminar outstanding concentric ribs and thin 

 spiral ridges; aperture broad, columella arched, 

 canal narrow, elongated ; spire very short, de- 

 pressed ; epidermis saffron. 



Quoy et Gaim.\ud. Voyage de I'Astrolabo. 



Narica Quoyi, Eecluz. 



Hob. Vauikoro, S. Pacific. 



In this species the oblicjue ribs are rather laminated 



in form, and rise to angular ridges in the most 



prominent parts. The colour of the epidermis is 



bright saffron on the younger specimens. 



Species 2. (Mus. Brit.) 



Vanikoi!0 GuEi;iNr.\XA. Van. tenia h,-eri, crassd, laid; 

 costis distaidibtis, crassis, perobliqnis, it ftnis 

 spiralibiis cancellatd ; aperturd laid, decHvi : raiia/i 

 oblique rectiusculo, canali Into, semilunari. 



Guerin's Vanikouo. Shell short, thick, broad, can- 

 cellated with distant, thick, very oblique ribs and 

 spiral striaj; aperture broad, sloped downwards: 

 canal obliquely nearly straight, canal broad, semi- 

 lunar. 



Recluz. Proc. Zool. Soc, 1843. 



Hab. Isl. of Capul, Philippines. 



The ribs are broad, thick, and distant. 



Species 3. (Jlus. Brit.) 

 Vanikoko plicata. Van. testa ijlobosd, tenuiitscula, 



costis numerosis tenuibus et striis spiralibus sculptd ; 



apice subacuminato ; canali semilunari ; columella 



rectiusculd. 

 The plaited Vanikoro. Shell globose, rather thin, 



scidptured with numerous thin ribs and spiral 



strijp ; ape.K rather acuminated; canal semilunar ; 



columella rather straight. 

 Kecluz. Proc. Zool. Soc, 1843. 

 Ilab. Isl. Ticao. 



Species 4. (Mus. Brit.) 



Vanikoro Cidarls. Van. testa rotuiuhl, irusf,'!. costi.i 

 talis, subdi.'ilantibus et striis .-pir.dihus .<r,itptd ; 

 spira depressd, acuminata ; aptrtm-'i iiinijaiL 'onali 

 moderate anr/tistatd, columelld rectiusadd. 



The Cidaris V.^nikoro. Shell rounded, thick, sculp- 

 tured with broad, rather distant ribs and si>iral 

 strife ; spire depressed, acuminated ; aperture 

 large, canal moderately narrow, columella rather 

 straight. 



Recluz. Proc. Zool. Soc, 1843. 



Hab. Isl. JIasbate, Philippines. 



May, 187 



