244 



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

 terior lateral smaller and distant. 

 Tumbez, 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 Madagascariensis (pi. lxiii. f. 218.) Gmelin, 

 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, pallide rosea, 

 laevigata; margine ventrali vix convexiusculo ; dorsali utrinque 

 valde declivi ; costa umbonali lata, obtusa ; latere antico manifeste 

 breviore, postico subcuneiformi ; extremitate antica, obtusa ; super- 

 ficie interna rosea, margine cardinali latissimo ; deutibus laterahbus 

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

 sionibus muscularibus-fortiter impressis. 



Ovate, very thick, 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 ; bgament 

 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 locality he gives, nor the expression " with coarse 

 transverse striae," will apply to this species. 



42. Telltna Tongana (pi. lxiii. f. 209.) Quoy and Gaimard, 

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



T. testa oblonga, soHda, subpellucida, subsequivalvi, convexa, 

 subeequilaterali, nitida, sublsevigata, alba (hitus albida), roseo ad 

 nates radiata, eodemque colore ad laterum extremitates ornatissime 

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

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

 tico paululum breviore, attenuato, subrostrato; fiexura ventrali 

 valde conspicua, ; costa, umbonali prominente ; umbonibus tumidis ; 

 ligamento infosso ; deutibus laterahbus haud magnis, subsequidis- 

 tantibus. 



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



