﻿C Y R E X A. 



Plate XVI. 



Species 82. (Fig. a, I, Mus. Brit.) 

 ('yki:x.\ Austealis. Ci/r. testa ovato-subtriijond. d 



fuM-d,vcla,n„„i;d, 

 latere antn;, hrrn. , 



luiioso-fiilvil, vel 

 ,„l,ir;t,-r rt Jrrii,-,- n„,.,td; 

 jnir ial.'r.,.,l„rsai; drrlir/, 

 IdifKjatd; lulrrr fio^tici jiradiicli^ infra medium 

 ueumtnalii, iiinrfji iie dnrsn-hileruli conEexiiisealo, 

 dcclivi, hrri.j;!.,'. 



The Au.sxhalian Cykexa. Sliell ovatc-svibtrigonal, 

 (lc]>i-e.ssod, i'oui])ressed, very pale smoky-fulvons, 

 or brown, or orange, irregularly and slightly 

 wriu!<lcd ; ^interior siile short, latero-donsal 

 margin slujied, sniooili ; posterior side produced, 

 acnniinated below tiie middle, dorso-lateral 

 margin rather convex, sloped, smooth. 



Desuaves. Ed. Lamarck. 



TIah. Isl. of Timor. 



Species 83. (Mus. Brit.) 



CviiENA TiYIUGIAN-A. Cijr. fesfd linnidd, .■^!,hrnf,u,J,l 

 ,lli:iitdi„r l„lil„d;„r,„ ,ni,n,„ti. ,'./ inlal.r.d i. rr,jii.. 

 lariler ^,iha-i><.,i;i,r ,1 sHh<li.l.,„f,r nn,„f.!. l,',fr.\ 

 gri.n,..,d,r!ridi.u,.r;, ,n,jrl,:,.f:.n,s'n.n.n,di:.ld, 

 inliiS dense violaced : muhmiih,,^ n,l„i,dis. elcvatis, 

 margine dorsal! v,iriii<iiie dcrliri ; latere postlco 

 infra medium aidiacn niinato. 



The Lydig Cyeena. Shell tumid, rather rounded, 

 the height equalling the breadth, equilateral, 

 regularly rather equally and distantly wrinkled, 

 greyish-green below, blackish above, rayed with 

 chestnut, deep purple within; umboes rounded, 

 raised, dorsal margin sloped on each side ; pos- 

 terior side rather acuminated below the middle. 



Prince. Cal. Corb. 3. 1863. 



Hat). Siam. 



Species 84. (Mus. Brit.) 

 CvEEXA semisulcata. Cijr. tedd iihJonijd, dejrressd, 

 fere Icevigatd, levlter parlim rwjatd, ohscure fulvd, 

 cfvrideo-fasciatd, >ntii,s dp.nse purpurea; latere 

 anticn hrerissimn, infra ■ntnhones sidiexcarato, 

 margine d,jr.ia!i eahli: derlici ; latere postico 



producto, ohhingo, margine dm-sali hritrr deeliei, 

 margine laterali late truncatn. 



The half-grooved Cykena. Shell oblong, depressed, 

 almost smooth, slightly wrinkled in parts, dnll 

 fulvous, banded with blue, deep purple within ; 

 anterior side very short, slightly hollow urnhn- 

 the umboes, dorsal margin much sloped ; poste- 

 rior side i)roduced, oblong, dorsal margin slightly 

 sloped, lateral margin liroadly truncated. 



Deshates. Proc. Zool. Soc. Is.", l, p. :;.i2. 



Hah. Pondicherrv. 



Species 85. (Mus. Brit.) 



r.w;„ 



al' 



Cyrena onsoLETA. Cyr. 



teiiuissiine .itriatd, cnmpressd. .■.■//;../•,,/ salieiridi, 

 medio rnfi-fnsra, intiix j,n riinrei! ; !,ifrrr ,in/ie,> 

 hrcvi, va'ld; dre/iri; „„d,und,n^ elerafi.. snh.irn- 

 ■miiudis, iiiarijine rrntrali e.inrr.m; liitrre ^n,s> in, 

 producto, dacliui, infra medium acamitialn. 



The OBSOLETE Cyrexa. Shell obliquely tn,<;-on;Ll. 

 high, very finely striated, compressed, greenish 

 above, reddish-brown in the middle, purple 

 within ; anterior side short, much sloped : pos- 

 terior side produced ; umboes raised, somewhai 

 acuminated, ventral margin convex ; posterioi' 

 side produced, sloped, acuminated below tlie 

 middle. 



Desh.U'es. Proc. Zool. Soc. I8.jf, ]i. 343. 



Eah. . ? 



Species 86. (Mus. Brit.) 



CyREKA INCEASS.WA. Cyr. testa Suln.vntd, drprrs--;;. 

 crassd, sithcompressd, dense fnsrn-subciridi, tenuis, 

 simi striata, feri- hi rignl,!, untiri/ distanter tenuiter 

 rugatd; latere antieu hnrissinio, infra umbunes 

 e.rcacatu; nmlxiuilius antiri' Inrlinatis, depressis ; 

 latere postlcu producto, aenniinati'. margine an::i- 

 atim declici. 



The thickened Cyrena. Shell rather oval, depressed, 

 thick, slightly compressed, dark greenish-brown, 

 very finely striated, almost smooth, with distant 

 slender wrinkles: anterior side vei-y short. In!- 



