TRIBE CQNCHACEA. HI 



299, 300. —List. t. 284./. \22— Bon. t. 44,— B. t. 4.f. 7. — W. 

 t. 7 f. 12. Rounded heart-shaped, tumid, whitish often tinged 

 with red, strong, with coarse transverse ribs which become warty 

 at the extremities, and indistinct longitudinal strise which are usually 

 apparent at the umbones ; anterior slope more or less spotted on 

 one side : lunule heart-shaped and wrinkled : white witliin. Di- 

 ameter If. — Europe.^ 



V. RuGOSA. Gmel. 3276. — Lam. 8. — V. Dysera. vnr. j3. 

 Lin. 1 130.— V. RiGiDA. D. p. 164.— Ch. f. 2,03.— E. t. 2/3. /. 

 4.— List. t. 286./. 123.— TF. t. 7. /. 13. Rounded heart-shaped, 

 very ventricose, with numerous transverse thin entire membranaceous 

 ridges, whitish, irregularly stained with spots or short angulated 

 streaks of pale brown ; anterior slope in one valve glabrous, lunule 

 heart-shaped but very short and broad : within uniform white, 

 with the rudiments of a fourth tooth and its receptacle. 2^. — 

 Indian Seas. 



V. Casina.* Lin. 1130.— D. p. \65.—Lam.9.— Ch.f. 301,2. 

 — W. t. 7./. 14.— Don. t. \49.— Turt. B. t. 3./. 1. Rounded 

 heart-shaped, slightly compressed, whitish or very pale fulvous, 

 becoming reddish at the beaks, and on the posterior side whose 

 depression is elongated heart-shaped ; marked with thin unequal 

 transverse entire ridges which curve towards the beaks ; white 

 within. Diameter 2. — Europe. 



V. Crebrisulca. Lnm. 10. — E. t. 276. /. 1. Rounded 

 heart-shaped, whitish with rufous spots and numerous transverse 

 obtuse ribs, which are almost elevated into ridges on the anterior 

 side ; lunule oblong heart-shaped, almost lamellar, rufous with a 

 small white spot at its base ; the anterior slope is sunken, linear, 

 margined with unequal tubercles, and often lettered on one side. 

 1|. — Indian Ocean.^ 



V. Plicata. Gmel. 3276.— D. p. 162.— iam. 11.— TF. t. 7. 

 f. 9.—Ch.f. 295, 6, 7.—E. t. 275. f. 3.— Reeve, t. 68./ 6. Some- 

 what heart-shaped, angulated towards the anterior end, rather 



IV. SuBCORDATA. Mont. t. 3./ \.—W.t.7.f. 16. The 

 copy we have made fi-om this figure much resembles the young of 

 Verrucosa. We have not, however, seen authenticated specimens. 



2 A species bearijig some slight resemblance to this shell, but a 

 specimen of which we have not been fortunate enough to procure, 

 (a copy of Chemnitz's fi,gure is given,) is the V. Cincta. Ch. f. 

 387.— D. p. 190.— TF. t. 8. f. 70. Triangular heart-shaped, 

 ventricose, with broad transverse ribs and the interstices crenulated, 

 white variegated with reddish-brown angulated spots ; lunule cor- 

 diform : inside white stained with purple under the umbones, 

 margin crenulated. 



