TRIBE CHAMACEA. bi 
polished white, violet, or purplish red, margin crenated. 13. Se- 
negal. Lamarck quotes as a variety E. t. 196. f. 2, theC Sxsstx1s 
of Wood. t. 9. f. 21. 
C. Froripa Lam. 6.—List. t. 215. f. 50. (good)—Ch. f. 518 ? 
Suborbicular, imbricated, mottled with white, yellow and rose 
colour, with arched scales disposed in longitudinal rows ; margin 
entire. St. Domingo. Not unlike Gryhoides. 
C. Livsutra Lam. 7. Semiorbicular, obliquely fixed, scarcely 
armed, the inner margin violet. New Holland.—Variety. The 
smaller valve gibbous. Isle of France-—‘This shell especially when 
young is rather scaiy beneath.’’ ‘The specimens from which this 
description was taken, are much worn. 
C. Aixvertnosa Lam 8. Suborbicular, reddish rufous, the larger 
valve foliaceous near the beaks, the scales of the other valve minute 
and arched: margin entire. T%mor—‘‘Very like Gryphoides” The 
original specimens in the Museum of the Jardin des Plantes, have 
the general appearance of the Lazarus of Lamarck. 
C. AspereLta. Lam. 9. Imbricated, bristling with arched and 
erect scales; margin crenulated.— Variety With shorter and more 
depressed scales. New Holland. 
C. Decussata. Lam. 10. Subglobose, squalid, with decussated 
strize, of which the transverse ones become more prominent towards 
the margin which is entire.—Size ofa small plum. Jndian Ocean. 
C. Arcinetta Lin. 1139.—D. p. 224.—Lam. 11.—Ch. f. 522,3 
—E.t. 197. f. 4.—W. t. 9. f. 25. Somewhat heart shaped, with 
very spinous Jongitudinal ribs and the interstices marked with im- 
pressed dots ; white, sometimes tinged with rose colour; posterior 
depression heart shaped ; margin crenulated and somewhat plaited. 
Diam. 13. S. America. 
C. Rapians Lam. 12.—Ch. f. 992.—E. t.196. f. 3. C. Sinis- 
TrorsA. W,t. 9. f. 24. Rounded, thick, obliquely affixed, rayed 
with white and rufous; lamella very short, crowded, depressed 
and arranged in undulatingly transverse unbroken rows; margin 
entire : cardinal teeth very obtuse—E. Indies. 
C. Cristerxa Lam. 13.—List. t. 213. f. 48 ?—Ch. f. 993? Se- 
miorbicular, involute, obliquely affixed, white spotted with orange, 
with distant plait-like transverse scales; margin crenulated. Jn- 
dian Ocean. 
C. Atsipa’ Lam.14. Semiorbicular, yellowish white, glabrous 


' From this species says M. Deshayes, Mr. Stutchbury has es- 
tablished his genus 
CLEIDOTH ZRUS. 
Inequivalve, irregular, affixed, the single cardinal conical tooth of the 
” 
Qn 
