124- 



all traces of coloured rays, llie younger shells, ■which retain the 

 coloured rays, are found in exposed situations at low water. 



A representation of the inside of this sheU has been given in my 

 ' Genera of Recent and FossU Shells', under the name of Fiss.picta, 

 Lam., from which it is nevertheless very distinct. 



Found on exposed rocks. — G. B. S. 



FissuRELLA BiRADiATA (Frcmbly MSS.). Fiss. testd ovatd, an- 

 tice subacuminatd, elevatiusculd, crassiusculd ; int^s albd, mar- 

 gine latiusculo, purpurasceiiti-fusco ; extiXs radiatim striatd, pur- 

 purascenti-fuscd, plerumque radiis duobus (utroque latere unicd) 

 pallescentibus ; aperturd dorsali oblongd : long. 3'8, lat.2'1 poll. 



Hab. ad Valparaiso sub lapidibus littoralibus. 



In this, as well as in several others, the margin varies somewhat in 

 width ; it is, however, generally broader in the young shells. The 

 fully grown specimens sometimes lose the two light-coloured rays. 



Found also at Iquiqui in Peru. — G. B. S. 



FissuRELLA LATA. F'lss. tcstd ovalt, elevutiusculd, crassiusculd; 

 intus albd, margine latiusculo, pallescente, rosaceo-viaculato ; ex- 

 tils cinerascente, radiatim costellatd, costellis subtuberculatis, ra- 

 diis coloratis purpureo-rufis ; aperturd dorsali ovato-oblongd : 

 long. 33, lat. 25 poll. 



Hab. ad Insulam S. Marise, Chilensis. 



This species approaches, in form and colouring, very nearly to 

 Fiss. picta. Lam. 



Found in exposed places. — G. B. S, 



FissuRELLA puLCHRA. Fiss. tcstd ovato-oblongd, depressd, antice 

 angustiore, crassiusculd ; intus albd, margine latiusculo, subundu- 

 lato, purpurascenti-fusco ; extiis purpureo-cinerascente, radiis 

 rufo-purpureis maculisque albis et violaceis concinne pictd ; aper- 

 turd dorsali centrali, postice inclinatd : long. 2'5, lat. I' 6 poll. 



Hab. ad Valparaiso. 



Obs. Testa junior radiatim subcostellata, 



Variat testa tota extus purpurascenti-fusca, unicolore. 



Found on the rocks. — G. B. S. 



FissuRELLA ORiENs. Fiss. tcstd ovato-oMongd, depressd, crassius- 

 culd ; intus albd, margine angustiore, plerumque pallescente ; ex- 

 tils pallidd fusco nigro vel roseo radiatd ,• aperturd dorsali ob- 

 longd, medians latiore: long. 2-7, lat. I' 6 poll. 



Hab. ad Insulam Chiloe sub lapidibus littoralibus. 



Variat testa extus obsolete picta, margine intemo paull6 latiore. 

 Hab. ad Valparaiso, rupibus adherens. — G. B. S. 



FissuRELLA Chilensis. Fiss. testd ellipticd, depressd, radiatim 

 costellatd, costellis 7-ugosis ; intHs albd, margine lato, pallescente, 

 nonnunquam fusco maculato; extiis cinerascente, radiis fuscis pal- 

 lidis plerumque pictd; aperturd dorsali oblongd, subcentrali: long. 

 2-4. lat. 1-8 poll. 



Hab. ad Valparaiso. 



Found on rocks in exposed situations at low water. — G. B, S. 



