CHAMA. 
Prater II. 
Species 4. (Fig. a and 4, Mus. Cuming. 
CHAMA LAZARUS. Cham.testé orbiculari, planiusculd, valvis 
ambabus pulcherrime lametlatis, lamellis conspicue folia- 
ceis et frondosis, supra et infra striatis, valvarum 
marginibus interne levibus; nived, rosco-purpureo 
interdum ab umbonibus tinctd et radiata. 
THE FOLIATED CHaMa. Shell orbicular, rather flattened, 
both valves very beautifully lamellated, lamelle con- 
spicuously foliaceous and frondose, striated above 
and beneath, margins of the valves smooth internally ; 
snowy white, sometimes stained and rayed from the 
wmbones with pink purple. 
Linnaus, Syst. Nat. (12th. edit.), p. 1139. 
Chama damecornis, Lamarck. 
Hab. Mauritius, Philippine Islands, &e. 
M. Deshayes has fully explained that Lamarck’s C. da- 
mecornis is the true C. lazarus of Linnzeus, according to 
the references given in the ‘Systema Nature’, and I have 
had the pleasure of verifying his statement by the original 
specimen in the collection of the Linnean Society. 
Species 5. (Mus. Cuming.) 
CHAMA SENEGALENSIS. Oham. testd suborbdiculari, ‘(pos- 
tice sublobatd, valud superiore minuté radiatim squa- 
matd, postice lamellarum seriebus duabus ornatd, infe- 
riore squamatd, sqguamis oblongis, irregularibus, adpres- 
sis, valvarum marginibus fortiter crenatis ; albidd, rubro- 
fusco uniradiatd, squamis lamellisque roseis, intus alba. 
Tue SenpGan Cuama. Shell somewhat orbicular, some- 
what lobed posteriorly, upper valve minutely radiately 
scaled, ornamented on the posterior side with two 
rows of lamellae, lower valve squamate, scales oblong, 
irregular, pressed down, margins of the valves strongly 
crenated ; whitish, with a single ray of reddish brown, 
scales and lamelle pink; interior white. 
Hab. Senegal. 
The umbones of this shell are very much produced, 
that of the attached valye being erected into a horn after 
the manner of the C. cornuta of Chemnitz, (C. unicornis, 
Lamarck), but I cannot identify it with the figure of the 
Conchylien Cabinet in respect of sculpture, and the pecu- 
larity of growth above noted is certainly, as M. Deshayes 
states, the force of accident. 
Species 6. (Mus. Cuming.) 
CHAMA MACROPHYLLA. Cham. testd ovatd, valvis ambabus 
undique lamellatis, lamellis imbricatis, grandis, wrre- 
gularibus, striatis, valvarum marginibus minutissimé 
crenulatis ; rosed aut vivide luted, intus albicante. 
THE LARGE-LEAVED Cuama. Shell ovate, both valves 
lamellated throughout, lamelle imbricated, large, 
irregular, striated, margins of the valves very mi- 
nutely crenulated; pink or bright yellow, interior 
whitish. 
Curmnitz, Conch. Cab. vol. vii. p. 149. pl. 52. f. 514, 515. 
Chama lazarus, Lamarck (not of Linneeus). 
Hab. West Indies. 
This prettily coloured and well-known species from the 
West Indies, was erroneously taken by Lamarck for the 
ancient C. lazarus of Linneus. 
Species 7. (Mus. Cuming.) 
CHAMA IOSTOMA. 
babus laminis continuis adpressis concentricé ornatis, 
postice liris perpaucis brevibus transversis, valvarum 
marginibus levibus ; albidd, circa umbones purpurea, 
intus alba, margines versus undique vivide violaceo-pur- 
pured. 
THE VIOLET-MouUTH CHama. Shell somewhat orbicular, 
both valves concentrically ornamented with conti- 
nuous pressed down laminz, with a few short trans- 
verse ridges on the posterior side, margins of the 
valves smooth; whitish, purple about the umbones, 
interior white, coloured with deep purple towards the 
margins throughout. 
ConraD, Journ. Acad. Nat. Sci. Philadelphia. 
Chama producta, Broderip. 
Hab. Sandwich Islands. 
Distinguished by its concentric lamine, which look like 
a row of fine plaited frills, and by the rich purple colowing 
of the interior towards the margins. 
The C. producta of Broderip, (Pl. III. Fig. 13,) is an 
enormously produced example of this species. 
Cham. testd suborbiculari, valvis am- 
Species 8. (Mus. Cuming.) 
CHAMA FOLIACEA. Cham. testé ovatd, trigond, valvis am- 
babus divaricatin striatis, striis subundulatis rugosis, 
December, 1846. 
