276 



arcuated ; hinder extremity attenuated and subrostrated ; fold and 

 flexure distinct ; the ligamental edge at first incurved, and then ob- 

 lique and slightly convex ; within often stained with rose colour ; 

 ligament sunken ; the approximate lateral tooth almost or entirely 

 obsolete. 

 Senegal. 



99. Tellina planata (pi. lxi. f. 174.) Lin.Sjs. 1117 ; Born, 

 t. 2. f. 9 j Lam. no. 20 ; Philip. En. Mol. Sic. vol. 1. p. 26 ; Hani. 

 Des. Cat. p. 63. t. 3. f. 24 ; Poli. vol. 1. t. 14. f. 1 to 5. 



Vae. (?) T. flavcscens operculata, Chem. vol. 6. f. 98. 



T. testa ovali, solidiuscula, insequivalvi, sequilaterali, convexius- 

 cula, nitida extus intusque albido-carnea, sublsevigata ; margine 

 ventrali convexiusculo, medio subrecto ; dorsali antice convexius- 

 cido paululumque declivi, postice subdeclivi et prope ligamentum 

 infossum subretuso ; latere antico rotundato ; postico subangulato ; 

 flexura costaque mnbonali satis conspicuis ; dente laterali parvo, 

 approximato. 



Oval, tolerably strong, inequivalve, equilateral, moderately con- 

 vex, nearly smooth, pale flesh colour ; ventral margin moderately 

 convex, but nearly straight in the middle ; anterior side rounded, 

 its dorsal edge convex and scarcely at all sloping ; posterior extre- 

 mity subangulated ; the ligamental margin moderately sloping, 

 refuse near the sunken ligament ; fold and flexure tolerably dis- 

 tinct ; inside flesh-coloured ; lateral tooth small, approximate. 



Mediterranean. 



The shell represented by Chemnitz (vol. vi. f. 98) is probably a 

 variety. It is slightly more elongated, with the radiating hues 

 more distinct. 



100. Tellina imbellis (pi. lx. f. 155.) Hmley, Zool. Proc. 

 1844. 



T. testa oblongo-ovali, solida, infequivalvi, insequilaterali, con- 

 vexa, nitida, extus intusque albida, valvula convexiore striis eleva- 

 tis concentricis postice notata ; valvula altera laevigata ; margine 

 ventrali convexo, postice sursum acclinato ; dorsali antice convexi- 

 usculo paululumque declivi, postice magis minusve declivi et sub- 

 retuso ; latere antico producto, rotundato ; postico brevi, obtuse 

 angulato ; flexura costaque umbonah obsoletis j ligamento promi- 

 nente ; dente laterah parvo, approximato. 



Oblong-oval, solid, inequivalve, inequilateral, convex, rather 

 glossy, whitish (inside white), smooth, excepting upon the poste- 

 rior side of the more convex valve, which is finely striated by raised 



