CHAMA. 
Prater VI. 
Species 29. (Mus. Cuming.) 
CHAMALOBATA. Cham. testd subrhomboided, anticé lobaté, 
utringue sinuosd, valvis ambabus ab umbonibus radiatim 
suleatis, concentricé laminatis, laminis valve superioris 
medio et postice appresso-foliaceis, inferioris anticé ap- 
presso-foliaceis, valvarum marginibus internis crenu- 
latis ; nived, fuscescente pallidissime radiata. 
Tur LOBED Cuama. Shell somewhat rhomboidal, lobed 
anteriorly, sinuous on each side, both valves radiately 
erooved from the umbones, concentrically laminated, 
laminze of the upper valve appressly foliated im the 
middle and posterior side, of the lower on the anterior 
side, imer margins of the valves crenulated; snowy 
white, faintly tinged with pale brown. 
Bropertp, Trans. Zool. Soc. vol. 1. p. 303. pl. 38. f. 4, 5. 
Hab. China; Reeves. 
Mr. Broderip has recorded “Island of Nevis, West 
Indies” as the habitat of this very characteristic species ; 
this must surely be an error, for there are several well- 
authenticated specimens in the British Museum, brought 
from China by John Reeves Esq., F.R.S., and I cannot 
learn that it has been received from any other locality. 
Species 30. (Mus. Cuming.) 
Cuama Rupprtuit. Cham. testd suborbiculari, valud infe- 
rviovt valde productd, crassiusculd, levigatd, plus 
minusve erosd; albidd, valvarum marginibus internis 
vivide rufo-purpureis. 
Rupprry?s Cuama. Shell somewhat orbicular, lower 
valve very much produced, rather thick, smooth, 
more or less eroded; whitish, inner margins of the 
valves deep red-purple. 
Hab. Red Sea; Riippell. 
Approximating closely to the C. iostoma, but from so 
remote a locality that I venture to distinguished it as a 
new species. 
Species 31. (Mus. Cuming.) 
CHaMA BRASSICA. Cham. testé suborbiculari-ovatda, circui- 
ter trigond, valvis ambabus rugosis, profuse squamatis, 
squamis valve superioris subfoliaceis, inferioris brevi- 
bus, erectis ; albidda, squamis roseis. 
Tor capBaGe Cuama. Shell somewhat orbicularly 
ovate, circuitously triangular, both valves rough, pro- 
fusely, squamate, scales of the upper valves slightly 
foliaceous, of the lower short and erect; whitish, 
scales pink. 
Hab. Island of Cabul, Philippines (under stones at low 
water) ; Cuming. 
An interesting curiously scaled species of peculiarly cir- 
cuitous growth. 
Fig. 3,5. Chama imbricata, junior, described at Sp. 3. 
Species 32. (Mus. Cuming.) 
CHAMA PELLUCIDA. Cham. testd orbiculari, circuiter tri- 
gon, lateraliter affixd, valvis ambabus pulcherrime con- 
centricé lamellatis, lamellis parvis suberectis, valvarum 
marginibus minutissime crenulatis ; albidd, peculiariter 
pellucida, coccineo-roseo ab umbonibus radiata. 
THE TRANSPARENT Cuama. Shell orbicular circuitously 
triangular, affixed by the side, both valves very beauti- 
fully concentrically lamellated, lamellz small, some- 
what erect, margins of the valves very minutely crenu- 
lated; whitish, peculiarly transparent, rayed from 
the umbones with scarlet rose. 
BropeEriP, Trans. Zool. Soc. vol. 1. p. 302. pl. 38. f. 3. 
Hab. Tquiqui, Peru (attached to stones and shells); Cuming. 
This beautiful and extremely interesting species is, I 
regret to say, very inadequately represented in the accom- 
panying figure; it is of the most delicate texture, and has 
the appearance of being formed of transparent white wax 
rayed with bright scarlet rosr. 
Species 33. (Mus. Cuming.) 
Cuama Carpir#rormis. Cham. testd ovata vel transversim 
oblongd, valvis ambabus radiatim minutissime squame- 
liratis, squamis appressis, posticis majoribus, valvarum 
marginibus crenulatis ; alba, lirarum interstitiis posticé 
coccineo-rufis. 
Tur CaRDITA-SHAPED CHAMA. Shell transversely oblong, 
both valves radiately very minutely ridged with ap- 
pressed scales, posteriorthe larger, margins of the valves 
crenulated; white, interstices between the ridges on 
the posterior side scarlet-red. 
Hab ? 
Easily distinguished by its peculiar oblong growth 
Which is not apparently accidental. 
January, 1847. 
