226 TESTACEOUS MOILUSCA. 



CHAMA. 



Irregular, hiequ'ivalve, adherent ; beaks incurved, unequal : hinge 

 with one thick oblique subcrenated tooth fitting into a hollow in the 

 opposite valve ; two distant lateral muscular impressions : ligament 

 external and depressed. 



C. M acrophylla Chem. f. 514,5. — C. Lazarus Lam. 1. {not 

 Lin)— Sow. G.— Reeve, t. 96. f. 3.— C. Gryphoides D. p. 221 — 

 W. t. 9./. \9.—E. t. 196./. 4>,5.—Seba 3. t. 88./. 8. Uniform 

 reddish purple or yellow, sometimes the former with a yellow tinge 

 at the beaks, never distinctly sinuated, imbricated with numerous 

 rather small close-set convex more or less linguiform foliations ar- 

 ranged in concentric wavy folds ; edges of the foliations simple, 

 never jagged or ramose. 2..1|. American Seas. 



C. Lazarus Lin. Mus. Ulr. 5\3.—Lin Sys. 1139.— D. p. 221. 

 — IV. t. 9./ 18.— Seba 3. t. 89./ 6,9,11.— C. Damcecornis Lam. 

 2.—Ch.f. 507, 8,9.— Sow. G.— Reeve Sys. t. 96./ \.—E. t. 197. 

 / 1. Imbricated ; white with purplish crimson spots at the base 

 of the lamellae which are deeply lobed ; lobes elongated, large, ra- 

 diatingly sulcated, forked at the apex. 4. Indian Seas. 



C. Gryphoides. Lin Syst. 1139 — Lam.. 3.- -Phil. 68. — Poli. t. 

 23. f. 3. (good)-Ch.f. 510 to 513.— E. t. \97.f. 2.—Blain. t. 70 

 / 2 — C. Foliacea W.t. 9./ 22. Uniform white (sometimes tin- 

 ged with red upon the scales and often somewhat rufous within) 

 imbricated, rather muricated, somewhat roughened by short de- 

 pressed plicated vaulted lamellae ; upper valve usually but slightly 

 convex though at times even more gibbose than the lower, whose 

 moderately sized apex is spiral (generally inclining outwards) and 

 turned to the right : tooth of the lower valve short, thick, com- 

 pressed, often striated, of the upper more depressed and subsinuated 

 1. Mediterranean. l 



C. Crenulatus Lam. 4. — Adamson Sen. t. 15. Jataron — E. t. 

 196./ 1. Almost round, rosy or flesh coloured, very strong, sub- 

 imbricated, unarmed, radiating, wrinkled, the wrinkles coarse, 

 unequal and very irregular : anteriorly with two interrupted callous 

 radiating ribs : apex of the lower valve somewhat spiral ; inside 



1 The Unicornis of Lamarc. 5. with a very produced beak, (Ch. 

 f. 519, 0.— E. t. 196. / 6.— C. Cornuta W. t. 9./ 20.) is no 

 more than a variety of this and Macrophylla. — The C Gryphina of 

 Phillipi. ]>. 68. is possibly a variety of his Gryphoides. " Imbri- 

 cated, thick, the sc iles unequal and most of them depressed ; apex 



the lower valve sinistral." 



