321 



angiilated below, or very obtusely wedge-shaped, the tip always 

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

 short liuiule ; teeth very large. 



G uinea. 



Tliis is probably the AUldgaardiana of ^lengler. 



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

 p. 91. f. 77 ; DiUw. Des. Cat. p. 77 ; Hani. Des. Cat. p. G9. t. 3. 

 f. 11 ; T. multangula, CimeL, 3230 ; Lam. no. 42. 



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

 lita, extus intusque albida, lineis elevatis confertis concentrice 

 striata, antice breviore, postice subcuneiformi ; margine vcntrali 

 subrecto ; dorsaH antice paulidum declivi, posticc longo subrccto 

 declivi ; extremitate antica obtusa ; postica attenuata et biaiigulata ; 

 tlexura costaque umbonaH perspicuis ; ligamento subinfosso ; deu- 

 tibus magnis. 



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

 within and without, roughened by coarse crowded concentric raised 

 striae, shorter in front, somewhat wedge-shaped behind ; \entral 

 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 ligamental margin long straightish and sloping ; fold 

 and flexure evident ; teeth large. 



Guinea. 



194. Tellina Bruguieri (pi. Lxii. f. 192.) Hanlcij, Zool. Proc. 

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



T. testa rotuudato-trigona, sohda, sidjsequilaterali, convexa, im- 

 pohta, extus intusque albida, subla;vigata, (aut striis exdibus ob- 

 soletis radiantibus strias concentricas tenuissimas decussantibus) ; 

 margine ventrali convexo aut subarcuato ; dorsah postice elevatiorc 

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

 tremitate antica obtusa ; postica rotundata ; natibus prominentibus, 

 et antice incumbcntibus ; fiexura costaque umbonali obsoletis; 

 ligamento infosso ; lunula parva ; dentibus maximis. 



Suborbicular, subtriangular, sohd, nearly equilateral, convex, 

 white 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 raihating lines and very fine concentric stria', which latter 

 arc chiefly aj)parent near the convex or subarcuated ventral juar- 

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



