244 



one of them rather large, anterior lateral rather approximate, pos- 

 terior lateral smaller and distant. 



Tmnbez, Peru. 



Var. More triangular, the close concentric sulci occupying the 

 entire surface. Chiriqui, West Columbia. 



Its extraordinary teeth, large and elongated ligament, and either 

 smooth or closely sulcated surface, suffice for its distinguishment. 



41. Tellina Madagascaribnsis (pi. Ixiii. f. 218.) Gmel'm, 

 3237 ; Wood Gen. Conch. 169. t. 39. f. 2, 3 ; List. 386. f. 233 ; 

 T. rosea. Lam. no. 14 ; Hani. Des. Cat. p. 63. t. 4. f. 46. 



T. testa ovata, crassissima, convexa, subimpolita, paUide rosea, 

 l8e\agata; margine ventraH vix convexiusculo ; dorsali utrinque 

 valde declivi ; costa umbonaH lata, obtusa ; latere antico manifesto 

 breviore, postico subcuneiformi ; extreiuitate antica obtusa ; super- 

 ficie interna rosea, margine cardinali latissimo ; dentibus laterahbus 

 subobsoletis, parvis, antico approximato, postico remoto ; impres- 

 sionibus muscularibus fortiter impressis. 



Ovate, very tliick, convex, rather dull, darker or paler pink, 

 smooth, ventral edge but little convex ; anterior side somewhat 

 the shorter, its extremity rounded, its slope moderate ; posterior 

 side subcuneiform, its extremity obtuse, its dorsal edge much 

 sloping and slightly convex ; umbonal ridge very obtuse ; hgament 

 prominent; inside rosy, scars deeply impressed; hinge-margin 

 very broad ; lateral teeth subobsolete, small, anterior one approxi- 

 mate, posterior distant. 



Madagascar. 



The figure in Lister is referred to by Spengler for his T. rudis, 

 but neither the locahty he gives, nor the expression " with coarse 

 transverse striae," will apply to tliis species. 



42. Tellina Tongana (pi. kiii. f. 209.) Quoy and Gaimard, 

 Astrolabe Zool. vol. iii. p. 498. t. 81. f. 11, 12, 13. 



T. testa oblonga, soHda, subpeUucida, subeequivalvi, convexa, 

 subsequilaterali, nitida, sublsevigata, alba (intus albida), roseo ad 

 nates radiata, eodemque colore ad lateruin extremitates ornatissime 

 picta ; margine ventrali subarcuato, postice sursum acclivi ; dor- 

 sali antice vix declivi, postice leviter dechvi convexo ; latere pos- 

 tico paululum breviore, attenuato, subrostrato; flexura ventrali 

 valde conspicua ; costa umbonali prominente ; umbonibus tumidis ; 

 ligamento infosso ; dentibus laterahbus baud magnis, subeequidis- 

 tantibus. 



Oblong, sohd, subequivalve, convex, subequilateral, rather pel- 



