TRIBE CONCHACEA. 105 



C. VuLNERATA. Bt'od. Z. P. 1835. Sub-globular, with very 

 uumerous smooth concentric lines, whitish, with here and there 

 purple-red narrow bands ; lunide and anterior area blackish-purple, 

 ventral margin red, sub crenulated within ; epidermis brownish ; 

 inside white suffused with pink. 1|- • • If. — C. America. 



C. Pannosa. Sow. Z. P. 1835. Obovate, thickish, smooth, 

 whitish, obscurely painted with lurid spots, streaks, or angular 

 lines : apices rather prominent. -^^^ . . I-^q- — Chili. 



C. Unicolor. So70. Z. p. 1835. Ovate, sub-cordiform, 

 thickish, brownish, smooth and polished, but the sides concentri- 

 cally grooved ; anterior side the longer, sub-acuminated towards 

 the ventral edge, which is smooth ; purplish within. — Varieti/. 

 Larger and whitish, l-ro • • W%- — ^' America. 



C. Argentina. Sam. Z. P. 1835. Sub triangular, white, 

 smooth, sub-equilateral, posterior side rather shorter, anterior sub- 

 acuminated ; anterior dorsal edge straightish, sloping ; ventral 

 margin rounded : epidermis thin, silvery-white, horny, velvety 

 without. 2^Q..2h' — C Aynerica. 



C CoNVEXA. Say. Journ. A. N. S. Phil. 4. t. 12. /. 3.— 

 GovM Jllas. p.SA.f. 49.~-List. f. 273. /. 109. ? Oval, sub- 

 cordate, inequilateral, thinnish, chalky-white, very convex, rounded 

 at the sides, marked with coarse lines of growth : ligament long 

 and somewhat sunken : beaks prominent and recurved ; lunule 

 distinct, cordate: inside polished, milk white. 1J..]|. — iV. 

 America. 



C. Prora. Co7ir. Journ. A. N. S. Phil. 7. p. 253. t. 19. /. 

 18. Inflated, polished, wbite, ovate-subcordate ; posterior side 

 short, sub-cuneiform, and sharply angulated at the extremity, which 

 is much elevated, its dorsal edge straight or slightly concave • 

 ventral edge well rounded ; lunule very slightly impressed, bounded 

 by a broad indistinct carina. If. -Pacijic. 



C. Floridella. — Chione F. Grat/ in Aiiali/st. \838. Ovate- 

 sub -cuneiform, depressed, much produced and attenuated anteriorly, 

 the ligamental edge sloping in almost a straight line to the antei'ior 

 extremity : posteriorly short and rounded ; ventral edge arcuated : 

 smooth (except on the anterior slope, which is concentrically 

 grooved,) polished, buff or drab, with more or less numerous and 

 distinct lighter rays interrupted by dark angulated or dotted 

 markings : lunule lanceolate ; inside orange, margin entire ; anterior 

 tooth rudimentary, f . . 14. — Senegal. 



C Planulata. Prod, and Sow. Z. J. 5. 77.48. — Beechey. 

 Zool. t. 43. /. &.— Reeve, t. 69./. 2.— Sow. G.f. 2. Triangular, 

 rather depressed, sub-equilateral, tliebase and lower angles rounded, 

 pale yellowish, with many diverging fuscous rays: inside white 

 varied with brownish violet, anterior tooth so remote as almost to 

 appear a lateral one. — Variety. More equilateral, rather more 



