TRIBE CONCHACEA. 113 



V. Plicata, hut rather shorter, the conceyitric 'plateshiglier, waved 

 and torn at the edge. 



V. Lamarckii. Gray in B. 31. — V. Subrostrata. Reeve. 

 t. 68. /. 4. {not Lam.)—W. S. t. 2. f. 7.— V. Cancellata. 

 Chem. f. 306, 7. (not Lam.)^E. t. 267. /. 7. Oval-cordate, 

 ventricose, anterior edge narrowed and obtusely sub-truncated at the 

 extremity, ventral edge well arcuated ; strong, white, with (usually) 

 about three interrupted chesnut rays, and regular, close, and acute 

 lamellae, which, as well as the interstices, are traversed by close-set 

 radiating riblets : lunule brown, cordiforra, and marked with radiat- 

 ing sulci: inside pale scarlet. 1 . . lA. — Red Sea. — Teeth nearly 

 those of a Cytherea. 



V. Gnidia. Brod. 4" Som. Z. J. 4. — Beechey. Zool. ^ 41. 

 f. 3.— Reeve, t. 68. f. 5— Del. t. 19./. 1. Equivalve, subven- 

 tricose, reddish fawn coloured but usually paler, with distant 

 concentric muricated ridges which posteriorly are more spinous : 

 radiating striae in pairs, a narrower one intervening : inside white, 

 the margin finely crenated. l-^o- . 2|-. — Pacific. 



Y. Dysera. ' Ckem. f. 291, 2.— An Lin. 1130?— Z>./;. 161. 

 — Knorr. 4. t. 24. /. 3 — W. t. 7. /. 7. Rounded heart-shaped, 

 convex, beaks greatly curved, whitish, with distant thin concentric 

 lamellae ; anterior slope shelving inwards and excavated ; poste- 

 riorly with a slight flexuosity: lunule heart-shaped: inside with a 

 brown stain adjoining the anterior muscular scar, the margin 

 crenulated. 1. 1. — Indian Seas? 



V. Berryii. Gray in W. S. t. 2.f. 2. Very obliquely heart- 

 shaped, very inequilateral, dark flesh colour with white concentric 

 rather distant narrow lamellae, which become obsolete anteriorly ; 

 anterior slope concave, white, smooth, sharp-edged ; lunule lan- 

 ceolate : inside stained with purple except on the disc, margin very 

 finely crenulated. 3^ . . 1. 



V. Nuttallii. Co?ir. Jour. A. N. S. Phil. 7. p. 250. t. 19. 

 f. 15. Ti-iangular, equilateral, thick, white, convex depressed, with 

 radiating flattened ribs, an alternating line in the interstices, and 

 about fourteen remote reflected concentric libs ; teeth large and 

 thick, inside with an anterior purple spot. 2. — California. 



V. Neglecta. So7v. in Beechey. Zool. p. 151. i^. 41. y. 8. 

 Lenticular, nearly circular, with strong radiating striae, and elevated 

 concentric ridges, posterior side shorter than the anterior which 

 is rather sloped ; dorsal edge with an elevated ridge, at which the 

 concentric ribs (which are crenulated beneath) begin, within which 

 is a broadish sloping somewhat smooth area ; brownish white with 

 angular dark brown marks and spots : inside white varied with 

 purple particularly anteriorly. 1^. — C America. 



V. Ornatissima. Brod. Z. P. 1835. Subglobular, with 

 numerous radiating ribs, which are depressed in the middle towards 



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