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Hab. ad Caput Bonse Spei. 



This exceedingly rare species has existed in our collections for 

 many years. — G. B. S. 



FissuRELLA ^QUALis. Fiss. testd oblongd, depressd, extremitati- 

 bus fere aqualibus ; intiis albd, margine incrassato, impressione 

 musculari prope inarginem remold j extiis lavi, albicantefusco ra- 

 diatd, vel fused albicante radiatd; aperturd dorsali magnd, ob- 

 longd, latd : long. 085, lat. 0*5 poll. 



Hab. ad Sanctam Elenam. 



Found on dead shells in from six to ten fathoms. — G. B. S. 



FissuRELLA FULVESCENS. F'lss . testd oblongd, depressd, fulves- 

 cente, extremitate anticd angustiore ; intiis lacted, margiiie sub- 

 incrassato, subrefiexo ; exfils lavigatd, radiatim substriatd et rufo 

 pictd ; aperturd oblongd, lateribus obsolete bidentatis : long. 1"6, 

 lat. 0-9 poll. 



Hab. ad Valparaiso sub lapidibus littoralibus. — G. B. S. 



/J^issuRELLA NiGRiTA. Fiss. testd ovolt, depressd, lateribus sub- 

 compressis, extremitatibus levatis ; intiis albd, marginibus postico 

 lateralibusque incrassatis ; extiis nigra, radiatim striatd ; aper- 

 turd dorsali magnd, ovali, margine IcEvi, albo : long T, lat. O'G 

 poll. 

 Hab. ?— G. B. S. 



FissuRELLA ASPERA. Fiss. testd ovali, altiusculd, asperd, postich 

 longiore ; intiis cinerascente, margine albo, crenulato, extiis cos- 

 tellis numerosis radiantibus decussatim muricatis ; aperturd. dor- 

 sali circulari ante verticem elevatam positd : long. !•, lat. 0'8 

 poll. 



Hab. ad Pacosmayo. — G. B. S. 



FissuRELLA ASPERELLA. Fiss. testd ovali, depressiusculd, asperelld; 

 intiis virescente, margine crenulato; extiis cinerascente, striis nu- 

 merosis radiantibus, radiisque coloratis rvfo-cinerascentibus; aper- 

 turd dorsali oblongd, dente utrinque extiis elevato: long. 0'85, lat. 

 0-5 poll. 



Hab. ad Insulam Lobos sub lapidibus littoralibus. — G.B.S. 



FissuRELLA MUTABiLis. Fiss. tcstd ovttto-oblongd, coloribus variis 

 plerumque subradiatim pictd, altiusculd, postice longiore; intiis 

 albd, margine Icevi ; extiis radiatim striatd; aperturd dorsali 

 ovato-elongatd, medio plerumque latiore : long. I', lat. 0'55 

 poll. 



Hab. ad Caput Bonse Spei. 



Many specimens of this species were among the late Mr. G. Hum- 

 phreys' collections, labelled by him "Brazil? Thalacker." — G.B.S. 



FissuRELLA Panamensis. Fiss. tcstd clUpticd, elevatd, decussatd, 

 postice longiore; intiis lactescente, margine crenulato; extiis cos- 

 tellis radiantibus decussatis, plerumque muricatis, albicante cine- 

 rascenti-fusco varie pictd ; aperturd dorsali minimd, subovali : 

 long. 0"6, lat. 0-4 poll. 



