321 



augulated below^ or very obtusely wedge-shaped, the lip always 

 rounded ; fold not very distinct ; ligament suidien ; a distinct 

 short lunule ; teeth very large. 



Guinea. 



This is probably the Abildgaardiana of Spengler. 



193, Tellina polygona (pi. bdi. f. 189.) Chemnitz, vol. vi. 

 p. 91. f. 77 ; Dillw. Des. Cat. p. 77 ; Hani. Des. Cat. p. 69. t. 3. 

 f. 11 ; T. multaugula, Gmel., 3230 ; Lam. no. 42. 



T. testa ovato-oblonga, solida, ventricosa, insequilaterali, impo- 

 lita, extus intusque albida, lineis elevatis confertis concentrice 

 striata, antice breviore, postice subcuneiformi ; margine ventrali 

 subrecto ; dorsah antice paululum declivi, postice longo subrecto 

 declivi ; extremitate antica obtusa ; postica attenuatu et biangulata ; 

 dexura costaque umbonali perspicuis ; ligamento subinfosso ; den- 

 tibus magnis. 



Ovate-oblong, solid, ventricose, inequilateral, not glossy, wliitish 

 within and without, roughened by coarse crowded concentric raised 

 striae, shorter in front, somewhat wedge-shaped beliind ; ventral 

 edge straightish, but rendered wavy by two extremely obsolete and 

 subcentral radiating ridges ; anterior extremity obtuse, dorsal edge 

 short and scarcely at all sloping; posterior tip narrow and bian- 

 gulated, the Hgamental margin long straightish and sloping ; fold 

 and flexure evident ; teeth large. 



Guinea. 



194. Tellina Bruguieri (pi. bdi. f. 192.) Kanley, Zool. Proc. 

 1844; Enc. Meth. t. 231. f. 2. 



T. testa rotundato-trigona, soHda, subsequilaterali, convexa, im- 

 polita, extus intusque albida, sublsevigata, (aut striis exilibus ob- 

 soletis rachantibus strias concentricas tenuissimas decussantibus) ; 

 margine ventrali convexo aut subarcuato ; dorsali postice elevatiore 

 valde declivi et paulidum convexo, antice arcuato et dechvi ; ex- 

 tremitate antica obtusa ; postica rotundata ; natibus prominentibus, 

 et antice hicumbentibus ; flexura costaque umbouaH obsoletis; 

 ligamento infosso ; lunula parva ; dentibus maximis. 



Suborbicular, subtriangular, solid, nearly equilateral, convex, 

 wliite witliin and without, dull, nearly smooth, when closely ex- 

 amined some of the adult specimens present the appearance of a 

 most minute decussation, caused by the intersection of delicate 

 obsolete radiating hues and very fine concentric stria?, wliich latter 

 are chiefly apparent near the convex or subarcuatcd ventral mar- 

 gin ; posterior dorsal edge abruptly sloping, shghtly convex, and 



