﻿PLANAXIS.— Plate I. 



Species 4. (Fig. a, h, c, Mus. Hanley.) 



Pl-^naxis sulcatus. Pla. testa trochiformi, crassn, 

 prof uncle sulcata, fusco-rubescenti, nigro alhoqne 

 maaulatd, costis prominentibus ; spird conicd, 

 anfractibus quints, ultimo magna, infra medium 

 obscure angidalo ; aperturd sxiUrigond, columelld 

 rectiHscula, lata, ad siifuniiii raldc caJlosd d 

 canaliculatd; labro iiifi'i< nili'ifr h'rnto.denticaJato, 

 margine crenulatu. 



The grooved Planaxis. Shell trochus-shaped, thick, 

 deeply- grooved, spotted with reddish-browu, 

 black and white, ribs prominent ; spire conical ; 

 whorls five, last large, obscurely angular below 

 the middle; aperture subtrigoual, columella 

 rather straight, broad, with a strong callosity and 

 a canal at the suture ; outer lip strongly tooth, 

 ridged within, margin crenulated. 



Born. (Buccinum) Mus. Vindob. p. 'loS, PI. X. f. 

 5,6. 



I'laiiaxis buccitioidi's. Deshayes. 



Planaxis wndidata. Lamarck. 



Bnccinum pijrumidale. Lamarck. 



Uab. Australia, Philippines, Mauritius, South Africa. 



Species •".. (Mus. Brit.) 



Planaxis uBSCDBLS. I'hi. Ir^td anguM' jiyraintd.nld, 

 profmid'e et erebrli S'ldcatd, ij.isrii. munihifd : siurd 

 elevafd, anfraatibus qioiii^. iijirrtnrd hi'n-i imrid'i. 

 canali po.<i;cn h,!„, ,;,l,n„rlld ,nr,n,t,i, „d temn- 

 num^ acta tni„r;tu: l.fl.,;. iiitiis ndidi' drnfato. 

 iium/inr tciiii, .<nhj!,'jin,s,i. 



The obscure Planaxis. Shell narrowly pyramidal, 

 deeply and closely grooved, grey, spotted ; spire 

 elevated, whorls five ; aperture rather short, 

 sharply truncated; outer lip strongly toothed 

 within, margin thin, rather flexuous. 



A. Adams. Proc. Zool. Soc. 1S51, p. 27L 



Hah. ? 



The whorls are more straight-sided than in Plnnaju's 



jihniicnstata, and the grooves ciirrower. 



Species G. (Mus. Brit.) 

 Pl.anaxis hkeviculus. Pla. testa breviter trochiformi, 

 laid, crassd, spiraliter {infra magis profundi) 



S'ldcatd, griseo-bruiined, nigro marida./d ; spird 

 brevi, anfractibus qwinis, ultimo viaximo, infra 

 medium obscure angulato ; aperturd subtrigond, 

 fused, ad marginem nigro maculatd, columelld 

 brevi, superne valide callosd, infra latd, late trun- 

 catd, labro fusco, liris dentiformibus magnis. 



The short little Planaxis. Shell shortly troehus- 

 shaped, broad, thick, spirally-grooved (more 

 deeply lielow), grey-brown, spotted with black; 

 spire short, whorls five, last very large, obscurely 

 angular ; aperture subtrigoual, brown, black- 

 spotted at the margin, columella short, with a 

 strong callus above, broad below, broadly trun- 

 cated, outer lip brown, with large tooth-shaped 

 ridges. 



Deshayks. Mag. de Zool. 1844, PL CVIIL 



ITah. Guam and New Guinea. 



Broader and more finely grooved than I'laiia.ris 



sidraia. 



Species 7. (Mus. Hanley.) 



Planaxis ncclecs. Pla. testa ovato-acuminatd, nigro- 

 fuscd, prope suturam,, infra medium et post margi- 

 nem aperturce profundii sulcata, medio IcBvigatd ; 

 sjiird breviii.scidd, acuminata ; anfractibus brevibus, 

 i-ouvexiiisculis ; aperturd pyriformi, longiiiscnld, 

 rulidissinu: bicamilirulatd, coluinrlld lati^^siwd. 

 planulatd, medio lougitudinaliter sulrat,!, t,rn,uw 

 .iubrotun.do; labio externo crpanso, validi crcnulato. 



Thi: little nut Planaxis. Shell ovate-acuminate, 

 black-brown, deeply grooved near the suture, 

 below the middle and behind the margin of the 

 aperture, smooth in the middle ; spire rather 

 short, acuminated, whorls short, a little convex ; 

 aperture pyriform, rather long, strongly bi- 

 canaliculated, columella very broad, flattened, 

 with a longitudinal groove in the middle, with 

 rather round end ; outer lip expanded, stroTigly 

 crenulated. 



Lamarck. Anim. s. Vert. Vol. VIL p. -249. 



Planaxis semisidcata. Sowerby. 



Hab. West Indies, Jamaica. 



The grooves, which are deep at the margins and 

 lower part of the last whorl, arc obsolete in the 

 middle of the whorls. 



