119 



retttsis, marginėm versus longioribus subspiniferis, inferiore rude. 



lamellatd, valvarum marginibus lavibus ; albd, squamis marginėm 



verstis rufo-fuscis, umbone roseo. 

 Hab. Island of Ticao, Philippines (attached to stones) ; Cuming. 

 The pink stain upon the umbone is probably a character which 

 may help to distinguish this species. 



Chamą APFRESSA. Cham. testd orbiculari, valvis ambabus concen- įįį^ 

 trice laminatis, laminis tenuibus plano -appressis, inferiore postice 

 liris perpaucis minutis obligue exsculptd, valvarum marginibus 

 leevibus ; albd, roseo-fuscescente sparsim tinctd. 



Hab. Hondūras ; Dyson. 



Distinguished by its concentric flatly appressed laminse. » ^ 



Chamą Ruppellii. Cham. testd suborbiculari, valvd inferiori valdi 

 productd, crassiusculd, Itevigatd, plūs minusve erosd ; albidd, val- 

 varum marginibus intemis vivide rufo-purpureis. 



Hab. Red Sea. 



Approximating closely to the C. iostoma, but from so remote a 

 locality that I venture to distinguish it as a new species. 



Chamą beassica. Cham. testd suhorbiculari-ovatd, circiter tri- 



gond, valvis ambabus rugosis, profuse sguamatis, sguamis valvce ^ l^l 

 superioris sub/oUaceis, inferioris brevibus, erectis ; albidd, sguamis 

 roseis. 

 Hab. Island of Cabul, Philipjnnes (under stones at low water) ; 

 Cuming. 



An interesting species, curiously scaled, and of peculiarly circui- 

 tous growth. 



Chama Cardit^formis. Cham. testd transversim oblongd, valvis it la 

 ambabus radiatim minutissime sguamce liratis, sguatnis appressis, 

 posticis majoribus, valvarum marginibus crenulatis ; albd, lirarum 

 interstitiis postice coccineo-rujis. 



Hab. ? 



Easily distinguished by its peculiar oblong growth, which appa- 

 rently is not accidental. 



Chama venosa. Cham. testd circuiter trigond, lateraliter affi,xd, P »•-« 

 valvis ambabus leevibus, radiatim subobsolete tricostatd, costis 

 aspere nodulosis ; albd, lineis purpureo-roseis obliguis undigue 

 venosd, intus albd. 



Hab. ? (Attached to shells.) 



The blood-red lines with which the entire surface of this shell is 

 painted are not less characteristic than the three faint sharply-no- 

 duled ribs. 



Chama Janus. Cham. testd circiter trigond, valvd inferiore et 

 dimidio postici superioris lavibus vel oblique obtuse liratis, squa- 

 martim brevium seriebus duabus radiantibus, valvd superiore un- ] '*H» 

 digue irregulariter appresso-squamatd , valvarum marginibus leevi- 

 bus ; purpureo-rufd, liris obliguis squamisque albis. 



Hab. Gallapagos Islands (attached to the large Aviculee) ; Cuming,^. 



