288 TELLINID.E. 



T. CRASSA, Pennant. 



Rounded oval ; strong, concentrically grooved ; witli lateral 

 teeth. 



Plate XX. figs. 1, 2. 



Lister, Hist. Conch, pi. 299, f. 136. 

 Tellina crassa, Penn. Brit. Zool. ed. 4, vol. iv. p. 87, pi. 48, f. 28. — Mont. Test. 

 Brit. p. 65. — Linn. Trans, vol. viii. p. 55. — Dorset Catalog, p. 

 30, pi. 7, f. 4,— TuRT. Conch. Diction, p. 173.— Turt. Dithyi-a 

 Brit. p. 109, pi. 7, f. 2.— Flem. Brit. Anim. p. 436.— Macgii.i.. 

 Moll. Aberd. p. 280. — Brit. Marine Conch, p. 80.— Wood, 

 General Conch, p. 186, pi. 40, f. 1. — Dillw. Recent Shells, vol. 

 i. p. 96. — Lam. Anim. s. Vert. (ed. Desh.) vol. vi. p. 201. — 

 Wood, Index Testaceolog. pi. 4, fig. 75. — Mawe. Conchology, 

 pi. 6, f. 7. — Hanl. Recent Shells, p. 68, pi. 4, f. 75. — Hanl. 

 in Sow. Thesaur. Conch, p. 265, pi. 61, f. 169, 173. 

 ? Pectuncidus depressus, Dx Cost A, Brit. Conch, p. 194, pi. 13, f. 4 (right hand 



fig.) 



Tellina mactdata, Adams, Linn. Trans, vol. iii. p. 252. — Linn. Trans, vol. viii. p. 



48.— Turt. Conch. Diction, p. 173, f. 13.— Turt. Dithyni 



Brit. p. 108, pi. 6, f. 7.— Flem. Brit. Anim. p. 436.— Brit. 



Marine Conch, p. 70. — Wood, General Conch, p. 153. 



Tellina rigida, Pui-teney, in llutchins' Hist. Dorset, p. 30. — DoNov. Brit. 



Shells, vol. iii. pi. 103. 

 Arcnpagia crussa. Brown, Illust. Conch. G. B. p. 99, pi. 40, f. 8. 



„ ovata. Brown, Illust. Conch. G. B. p. 99, pi. 40, f. 9, 10. 

 Tellina ohiusa, Sowerby, Min. Conch, pi. 179, f. 4. 



Of a rounded oval form, very inequilateral, and of a 

 solid opaque texture, the valves of this pretty shell arc 

 rather ventricose when united, but not quite equal in pro- 

 fundity, the left being rather the more depressed. The 

 exterior, which is rather dull, and of a more or less squalid 

 white, is usually adorned with narrow rays of crimson red, 

 but is occasionally devoid of any painting : it is likewise 

 most closely, coarsely, and rather irregularly grooved con- 

 centrically; there is no interstitial decussation. The ventral 

 margin is well arcuated, and rises far more on the posterior 

 side, the chief swell being in front of the shell. The ante- 

 rior side is the more produced, and a little attenuated at 



