CHAMA. 
Prats VIII. 
Species 41. (Mus. Cuming.) 
CuaMA FrMBRIATA. Cham. testd suborbiculari, valvis 
ambabus concentricé fimbriato-lamellatis, valvarum mar- 
ginibus minuté crenulatis ; lutescente-albd. 
THE FIMBRIATED Cuama. Shell somewhat orbicular, both 
valves concentrically fimbriately lamellated ; margins 
of the valves minutely crenulated ; yellowish white. 
Hab. Point Cunningham, North Australia; Dring. 
A very distinct species though its characters are set 
forth in few words; the lamelle are not isolated as in 
most of the genus, but arranged in concentric continuous 
wavy frills. 
Species 42. (Mus. Cuming.) 
CHAMA CRISTELLA. Cham. testé semiorbiculari, circuiter 
trigond, lateraliter affiva, valvé superiore concentrice 
tenuissime laminatd, laminis appressis, squamulis minu- 
tis asperis subremotis, inferiore compariter levigati, 
squamulis minutis retusis subremotis, valvarum margi- 
nibus crenulatis; albé aut lutescente, corallo-roseo 
pulcherrime tincta, sqamulis albis. 
THE LITTLE crEsT Cuama. Shell semiorbicular, circui- 
tously triangular, affixed by the side, upper valve 
concentrically very finely laminated, laminze pressed 
down, with minute sharp rather remote scales, lower 
valve comparatively smooth, with rather remote 
blunted minute scales, margins of the valves crenu- 
lated; white or yellowish, very beautifully stained 
with coral-rose, scales white. 
Lamarck, Anim.sans vert. (Deshayes’ edit.) vol. vi. p. 585. 
Hab. Batavia (attached to stones) ; Cuming. 
An extremely pretty and well-defined species, of which 
the example here figured has been satisfactorily indentified 
with Lamarck’s original specimen in the collection of M. 
Delessert. 
Species 43. (Mus. Cuming.) 
CHAMA GRYPHINA. Cham. testé semiorbiculari, circuiter 
trigond, lateraliter affivd, valvis ambabus concentricé 
laminatis, laminis appressis, antice fimbriatis erectis, 
valvarum marginibus levibus: albidd, lutescente anticé 
tinctda. 
THE crooknD Cama. Shell semiorbicular, circuitously 
triangular, affixed by the side, both valves concentri- 
cally laminated, lamin pressed down, fimbriated and 
erect on the anterior side. 
Lamarck, Anim. sans vert. (Deshayes’ edit.) vol. v. p. 587. 
Hab. Sicily, Corsica. 
Only known to Lamarck in a fossil state. 
Species 6. Variety B (Fig. 6 4. Mus. Cuming.) 
CHAMA MACROPHYLLA. Testa plerumque grandior, omnino 
purpureo-lacca. 
THE LARGE-LEAVED CHAMA. 
purple-lake throughout. 
Having already described this species at Plate IT. Sp. 6. 
it only remains to notice the purple-lake variety of which 
I have since thought it necessary to give a representation 
on account of its marked difference in colour; it is also 
mostly of larger size. 
Shell generally larger, 
Species 44. (Mus. Cuming.) 
CuaMa spinosa. Cham. testd@ orbiculari, planiusculd, 
valvd superiore profuse et minutissime squamatd, squa- 
mis umbonem versus laminiferis, marginem versus tubu- 
losis, spinosis, inferiore rudé squamatd, squamis imbri- 
catis et wregulariter fimbriatis, valvarum marginibus 
vie crenulatis ; albidd, spinis posticis plerumque ferru- 
gineo-fusco tinctis. 
Tue sprnous Cuama. Shell orbicular, rather flat, upper 
valve profusely and very minutely scaled, scales lami- 
niferous towards the umbone, tubulous and spinous 
towards the margin, lower valve rudely squamate, 
scales imbricated and irregularly fimbriated, margins 
‘of the valves scarcely crenulated ; whitish, posterior 
spines mostly stained with rust-brown. 
Broperip, Trans. Zool. Soc. vol. 1. p. 306. pl. 38. f. 8. 
and 9. 
Hab. Lord Hood’s Island, Pacific Ocean (attached to coral 
and shells) ; Cuming. 
Distinguished by the narrow tubulous structure of the 
spines, which are appressed and range in fine lamine 
towards the umbone. 
Species 45. (Mus. Cuming.) 
CuamMa PanameEnsis. Cham. testd ovatd, circuiter trigond, 
lateraliter affivd, valvd superiore posticé levi, tenuis 
January, 1847. 
