320 



dorsali utrinque satis declivi^ autice convexo, postice prope nates 

 subretuso deindeque convexiusculo ; latere antico rotimdato, bre- 

 viore ; postico obtuse aciiminato et paululum subrostrato ; natibus 

 obtusis; flexura costaque umbouali obsoletis; superficie interna 

 plermnque crocea ; dentibus satis magnis. 



Var. Magis elongata, tumida ; striis lamellosis ; margine ven- 

 trali minus convexo ; extremitate postica obtuse biangulata. 



Ovate-trigonal, moderately solid, sliglitly pellucid, very inequi- 

 lateral, rather tumid ; almost devoid of glossiness, whitish with a 

 tinge of yellow or saffron colour (wliich sometimes but rarely per- 

 vades the entire surface) upon the umbones ; rough with concen- 

 tric elevated rather distant strise; ventral edge convex; dorsal 

 slightly retuse on either side of the obtuse beaks, and then convex 

 and rather sloping in front, scarcely convex but decidedly sloping 

 beliind ; anterior side short and rounded ; posterior obtusely acu- 

 minated and very slightly subrostrated ; fold and flexure obsolete ; 

 inside usually of a saffron colour ; teeth rather large, two diverging 

 ones in one valve, a recurved one in the other. 



Var. Elongated and not at all triangular, tumid; the stria? 

 lamellar ; ventral edge scarcely at aU convex ; liinder end obtusely 

 biangulated. 



Scarcely a Tellina, but with the teeth and general characters of 

 so many usually included in that genus, that I know not how to 

 separate it. From the figure in Delessert, the Psamtnotcea Tarentina 

 of Lamarck is probably a variety of tliis shell. 



Britain, Europe. 



192. Tellina Guinaica (pi. hx. f. 130.) Chemnitz, vol. xi. 

 p. 348. f. 1651, 1652, 1653 ; Ddlw. Des. Cat. p. 69 ; T. polygona, 

 Gmel.; Lam. no. 43. 



T. testa ovata, sohda, ventricosa, impolita, inajquilaterah, extus 

 intusque albida, hneis rudioribus subremotis elevatis concentrice 

 striata ; margine ventrali magis minusve convexo ; dorsaK postice 

 subdechvi et subrecto, antice magis declivi et subincurvato ; latere 

 antico brevi, rotundato ; latere postico rotundato-angulato aut obtu- 

 sissinie cuneiformi, extremitate ejus semper rotundata; costa um- 

 bonaK subinconspicua ; lunula distincta ; bgamento infosso ; denti- 

 bus magnis. 



Ovate, solid, ventricose, dull, inequilateral, witliin and without 

 whitish, roughened by coarse raised concentric and rather distant 

 strise ; ventral edge more or less convex ; dorsid edge straightish 

 and not much sloping behind, more sloping and somewhat incui'ved 

 in front ; anterior side short and rounded ; posterior somewhat 



