270 Zoological Society. 



cequante, supra columellam intus gibhoso ; columelld brevi, ad 

 basin aperturcB oblique truncatd ; aperturd angustissimd, basi sub- 

 canaliculatd ; peristomate simplice, marginibus callo junctis , dextro 

 antrorsum arcualo-dilatato. 



Long. 21, diam. 6 mill. 



From the island of Cuba (Lindon). 



38. Cylindrella Sowerbyana, Pfr. Cyl. testd truncatd, cylin- 

 draceo-subulatd, solidiusculd, oblique subarcuatim costulato-striatd^ 

 opacd, cinnamomeo et albo radiatd; anfractibus {spec, trunc.) 16 

 angustis, convexiusculis , ultimo basi subcarinato {carind parum 

 prominente,fere rectanguld), anticevix protracto, subtilius striata; 

 aperturd subcirculari ; peristomate undique libero, tenui, breviter 

 cxpanso, margine supero sursum dilalato. 



Long. 35, diam. 8 mill. 



From the island of Cuba (Lindon). 



December 22.— R. C. Griffith, Esq., in the Chair. 



The following descriptions of new species of Chama, by Lovell 

 Reeve, were communicated by Hugh Cuming, Esq. 



Ohama fimbriata. Cham, testd suborbiculari, valvis ambabus 

 concentrice fimbriato-lamellatis, valvarum marginibus minute cre- 

 nulatis ; lutescente-albd. 

 Hab. Point Cunningham, North Australia; Dring. 

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

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

 arranged in concentric continuous wavy frills. 



Chama panamensis. Cham, testd ovatd, circiter trigond, late- 

 raliter affixd, valvd superiore postice Icevi, tenuissime appresso- 

 laminatd, antice rugosd, rude fimbriatd, inferiore Icevi, per basim 

 lamellatd, valvarum marginibus Icevibus; albidd, ferrugineo-fusco 

 hie illic tinctd. 



Hab. Panama (attached to stones) ; Cuming. 



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

 by its twofold style of sculpture. 



Chama pr^etexta. Cham, testd ovatd, valvis ambabus concentric"^ 

 pulcherrime fimbriatis, jimbriis tenuibus subpellucidis , grandibus, 

 plus minusve erectis, valvarum marginibus Icevibus ; pallide croced, 

 jimbriis 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 

 several Lamarckian species of this genus, and even the Linnsean 

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

 degree of certainty. 



Chama exigua. Cham, testd parvd, tenui, subpellucidd, circiter 

 -' ■ trigond, lateraliter affixd, valvd superiore minutissime appresso- 



