﻿G A S T 1{ C E £ N A. 



I'l.MK IV. 



Species 20. (F. b. See Plate III.) 



>piM 



■2]. (Mils. Brit.) 



G.^SrHOCll.KNA 1IY.\I.I\.\. (111.-;, tr.lia A/i /((W/i/iU, .<(;)»(■- 

 ]»'lhir<(ht, iiiliijiir iittriniiiid, mitiri: hreviasimd, 

 onipifti.tsimii, /lun/iri' lu/iihi-Hld, iiriiiui'iiati! ; Iiiatu 

 h,Yvi>:tcu}o. 



The HYAI.IXE GastI!ocii.+:\.\. Shell very thin, seini- 

 pelluciil, obliquely attemiMleil, ;uiteri(irly very 

 short, posteriorly rather broriiler, aeuniiiiateil ; 

 hiatus rather short. 



So\via:i;v. Proe. Zool. Soe. 1K:U, ]>. 22. 



Jl.,1,, ■; 



Species 22. (Mus. Urit.) 



GASTl;OC)l.t:N.\ SrA'lHUI.ATA. (/((.-■. //>■/<( trnni.-isilinl. Com.- 



lallhii^: hiid,, 



innhoniliHs fi 



cloiirjafn. 

 The sPATi'LATE GAsTROcn.ENA. Shell very thin, con 



j)ressed, wedge-shaped, posteriorly wrinklei 



tnmcated ; umbones terminal ; hiatns rutin 



narrow, elongated. 

 Deshayes. Proc. ZooI. Soc. 18o4, p. 22'.t. 

 Jfah. I.sl. Boliol, Philippines. 



Species 2o. (Mus. Brit.) 



Ga.stuooh.EXA IMPREssa. (.'(/.S-. tfs/il !-uhiirati'i, tnnii, 

 trmntir stnaiil, ptninii',- ,n-in„!n,dil, '[i„.<tkh oh- 

 l!i/,ir ..„;,-„ ilrprcs,,: : luiitii liili..Ai,H,jati,, fi,i 

 ii'l ti'iiamuiii valvir r.rtni.-^i,. 



The impressed Gastrochjina. Shell rather oval, 



thin, tinely striated, acuminated at each end ; 



posteriorly obliquely depressed with a groove; 



hiatus broad, elongated, nearly extended to the 



end of the valve. 

 Deshayes. Proe. Zool. Soe. ISo-l, p. 022. 

 llah. : 



Species 21. (Mus. Brit.) 



Gasi'ROCH.EXA l..EVl(iATA. Oil.--. Ii'.^ii! reiiln'rn.-^il . Iirrri, 

 Muinv ciu„;j.in,u\ hn-iijnlii, i-,rriiln.-i,lhii : l.iti;Y 

 jH..'<t;cosiilnu-,UHiiiat„; lualn l,i-ri;\ iii,.jii<liii.-<r,>li,. 



Tin; sMOiirii Gasiroch.t.xa. Shell ventricose, short, 

 (il)li(|iiely cuneiform, smooth, bluish white, pos- 

 terior siile rather acuminated; hiatus short, 

 rather narrow. 



Dksiiayes. Proe. Zool. Soc. 18.-i4. p. 320. 



Species 2h. (Mus. Brit.) 



Gastro. H.KSA lIl-Mir.IS. Gi:^. ii:<ir, rnifi-i'riis.!, Iirrri, 

 iihtiqn-e nuuijonni, teiiuiti-r i-nui-nitni-r .^Iriiilu : 

 liik,;: portico sHhwam-iHah ; hmtu hirn; ,n,,,„^/i,is. 

 chIo. 



The hu.mule Gastkoch.e.na. Shell ventricose, short, 

 obliquely cuneiform, finely concentrically 

 striated ; posterior side rather acumiitated ; 

 hiatus short, leather narrow. 



Deshayes. I'roc. Zool. Soc. 18->1-, p. o27. 



Huh. St. Vincent. 



Species 20. (Mus. Brit.) 



n;nen ENA INTERSECTA. f/./.--. t,'.<td In-cci, Ulhl, Sfl,. 



lantihii^ et aUrri.< ;„t,;;,in!;;:< ■iiiinnribii.-^ t.uniitrr 

 ..Cilrld: l„h,;'.,:.i;ru „ „.i„.i;..nn... hrrr!; hifrr, 

 posli.:, h,l., wanjair dnr.-^ai; rlrrol,, nuuyiu. f,r. 

 vuniiU <l,lr.'tll,ld<lln. 



INTERSEUIED Gastkoch.e.n A. Shell .short, broad, 

 rather compressed, sculptured with immerous 

 rather distant and other intermediate smaller 

 concentric laminas ; anterior side very narrow, 

 short ; posterior side broad, dorsal margin raised, 

 terminal margin rather rounded. 

 HAYES. Proc. Zool. Soc. l8"'-i, p. ;>27. 



