Zoological Society. 271 



laminatd et radiatim striatd, subasperd, inferiore divaricatim ex- 

 cavato-punctatd, per basim lamellatd ; albd. 

 Hob. Singapore (dredged from sandy mud at the depth of seven 

 fathoms attached to fragments of shells) ; Cuming. 



A little transparent white shell, of which Mr. Cuming collected 

 several specimens ; the lower valve is distinguished by a peculiarity 

 of punctured sculpture somewhat analogous to that of the C arcinella ; 

 there is no trace of it, however, in the upper valve, as in that species. 



Chama fragum. Cham, testd suborbiculari, valvd superiore con- 



centrice tenuissime fimbriato-laminatd, laminis marginem versus 



subtubulosis, inferiore rude tubuloso-squamatd, valvarum margini- 



bus minute crenulatis ; albd, rufo-punctatd, intus albidd, 



Hab, Island of Mindoro, Philippines (attached to coral) ; Cuming. 



The sculpture of this species somewhat approaches that of the 



C. spinosa ; it is of a more minute and delicate character and easily 



distinguished on comparison. 



Chama variegata. Cham, testd oblong o-ovatd, circiter trigond, 

 valvd superiore lamellatd, pracipue in seriebus duabus posticis, 

 lamellis latiusculis appressis, interstitiis oblique rugoso-liratis, 

 squamis perpaucis brevibus remotis, valvarum marginibus Icevibus ; 

 corallo-rubrd, liris lamellis squamisque albis, intus albidd^ rufo- 

 fusco tinctd. 

 Hab. Honduras; Dyson. 



The colouring of this shell has a very pretty effect, the oblique 

 ridges and other external sculpture being white upon a coral or 

 orange-red. ground. 



Chama cistula. Cham, testd orbicular i, postice profundi sinuatd, 

 valvis ambabus peculiariter rude lamellatd et squamatd, squamis 

 ad margines subproductis, appressis, valvarum marginibus lecvibus ; 

 albidd, roseo-fuscescente varid, intus albd. 

 Hab, Honduras ; Dyson. 



The upper valve of this shell is rather more convex than usual ; 

 the sculpture peculiarly rudely developed. 



» Chama tumulosa. Cham, testd orbiculari, postice subprofund^ 

 sinuatd, valvis ambabus valde convexis, rude tumulosis et imbri- 

 catis, interstitiis postice oblique liratis, liris minutissime squamatis, 

 valvarum marginibus lavibus ; aurantio rufoque varid, liris posticis 

 albis, intus albd. 

 Hab. Honduras (attached to coral) ; Dyson. 

 A striking species, though of rude growth ; it is doubly sinuated 

 on the posterior side, having round orange protuberances along the 

 summit, whilst the channeled interstices have a striped appearance, 

 from their being crossed by white ridges on a blood-red ground. 



Chama lingua-felis. Cham, testd orbiculari, supra depressiusculd, 

 valvis ambabus prcccipue inferiore minute retuse squamatis, supe- 

 riore pulcherrime fimbriato-laminatd, laminis appressis, postic^ 

 concavo-planatd, ad angulos elongato-lamellatis, valvarum margini- 

 bus IcEvibus ; nived, rosaceo hie illic tinctd. 



