295 



with the tip rounded, the dorsal edge nearly straight, moderately 

 sloping, and very long; ligament sunken; umbonal ridge and 

 flexure obsolete ; lateral tooth approximate. 

 Hab. ? Mus. Britannicum. 



140. Tellina planissima (pi. lix. f. 124. and pi. lxii. f. 197.) 

 Anton, Yerzn. Conch, p. 4 ; Ab. und Bes. Conch, part 5. t. 5. f. 2; 

 TeUinides rosea, Sow. Gen. Shells, f. 1 ; Reeve, Conch. Syst. t. 56. 

 f. 1. 



T. testa ovata, tenuiuscula, insequivalvi, hiEequilaterali, com- 

 pressa, extus intusque rosea, concentrice substriata ; margine ven- 

 trah convexiusculo ; dorsali utrinque declivi, antice convexo, pos- 

 tice subrecto ; latere antico rotundato ; postico longiore, rotun- 

 dato-cuneiformi ; ligamento prominente; flexura subobsoleta; 

 costella interna in valvula complanata postice radiante; dente 

 laterali parvo, approximato. 



Var. Candida. 



Ovate, rather thin, inequivalve, inequilateral, compressed, rose- 

 coloured both within and without, concentrically substriated ; ven- 

 tral margin moderately convex, the flexure not quite obsolete; 

 dorsal edges sloping, the anterior convex, the posterior nearly 

 straight; anterior extremity rounded; posterior side the longer 

 and of a rounded wedge-shape ; ligament prominent ; an internal 

 rib radiating posteriorward in the flattened valve; lateral tooth 

 small, approximate. 



Var. Quite white. 



Moluccas. 



The Opalina of Chemnitz is closely allied to, if not identical 

 with, the white variety of this shell. 



141. Tellina (Tellinides) purpurascens (pi. lxii. f. 194.) 

 Broderip and Sowerby, Zool. Jour. vol. iv. p. 363 ; Hani. Des. Cat. 

 p. 74. sup. t. 9. f. 18 ; Zool. 6660116/8 Voy. t. 42. f. 2. 



T. testa oblongo-ovah, tenui, compressa, nitidiuscula, subsequi- 

 laterali, roseo-purpurascente, pellucida, striis radiantibus et con- 

 centricis confertissime dccussata ; margine ventrah convexiusculo ; 

 dorsali utrinque paululum declivi, antice convexiusculo, postice 

 subrecto; latere antico minime longiore, rotundato; extremitate 

 postica subangulata, subemarginata ; ligamento prominente ; flex- 

 ura, omnino obsolete ; dente laterali approximato. 



Oblong-oval, thin, compressed, rather glossy, nearly equilateral, 

 purplish-rose coloured, pellucid, decussated by most crowded radi- 

 ating and concentric striae; ventral margin moderately convex; 



x 2 



