117 



December 22, 1846. 



R. C. Griffith, Esq., in the Chair, 



The following descriptions of new species of Chamą, by Loveli 

 Reeve, were communicated by Hugh Cuming, Esq. 



Chamą fimbriata. Cham. testd suborbiculari, valvis ambabus r> ■ 

 concentrice fimbriato-lamellatis, valvarum marginibus minutė ere- ' ' ' 

 nulatis ; lutescente-albd. 

 Hab. Point Cunningham, North Australia ; Dring. 

 A very distinct species, though its characters are set forth in few 

 words ; the lamellae are not isolated as in most of the genus, but 

 arranged in concentric continuous wavy frills. 



Chamą Panamensis. Cham. testd ovatd, circiter trigond, late- 

 raliter affixd, valvd superiore postici Icevi, tenuissiml appresso- h 

 laminatd, antice rugosd, rude fimbriutd, inferiore Itevi, per basim ' 



lamellatd, valvarum marginibus Icevibus ; albidd, ferrugineo-fusco 

 hic illic tinctd. 



Hab. Panama (attached to stones) ; Cuming. 



The upper valve of this shell is distinguished in a peculiar manner 

 by its tvvofold style of sculpture. 



Chamą pr^texta. Cham. testd ovatd, valvis ambabus concentrici 

 pulcherrime fimbriatis, fimbriis tenuibus subpellucidis, grandibus, ] }^ 

 plūs minusve erectis, valvarum marginibus lavibus ; pallide croced, 

 fimbriis supra rufescentibus. 



Hab. ? 



This truly delicate and beautiful shell was received by Mr. Cuming 

 from a Continental naturalist of some celebrity as the C. croceata of 

 Lamarck, but it does not answer to the description. There are 

 Severai Lamarckian species of this genus, and even the Linnaean 

 C. gryphoides, which it is quite impossible to identify with the least 

 degree of certainty. 



Chamą exigua. Cham. testd parvd, tenui, subpellucidd, circuiter 

 trigond, lateraliter affixd, valvd superiore minutissimk appresso- \\ u 

 laminatd et radiatim striatd, subasperd, inferiore divaricatim ex- 

 cavato-puactatd, per basim lamellatd ,- albd. 

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

 fathoms attached to fragments of shells) ; Cuming. 



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

 Severai specimens ; the lower valve is distinguished by a peculiarity 

 of punetured sculpture somevvhat analogous to that of the C. arcinella ; 

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



Chamą fragum. Cham. testd suborhiailari, vnlvd superiore con- 



