324 



lida^ subventricosa, subimpolitu, sublsevigata^ extiis intusqiie albicla., 

 umbouibus aurantio-roseis ; margine ventrali subrecto aut paulu- 

 hun convexo ; dorsali antico vix declivi et prope nates prominulas 

 subretuso, deinde magis minusve convexo; margine ligamentali 

 declivi, subrecto; extremitate antica rotundata; latere postico 

 breviore, obtuse cuneifornii ; flexura, subobsoleta, (rarius distincta) ; 

 ligamento iiifosso. 



Var. Testa raajore, impolita, opaca, concentrice subrugosa, 

 umbonibus baud erubescentibus ; flexura costaque umbonali dis- 

 tinctis. 



Varying in form from obovate to oval, more or less solid, rather 

 ventricose, rarely at all glossy, wliitisli with the umbones reddish 

 crimson, nearly smooth, (in full grown individuals wdth a few con- 

 centric striae near the scarcely convex ventral margin, whose flexure 

 is rarely distinct) ; anterior side the longer, sometimes greatly, at 

 others scarcely so, its dorsal edge for about half its length fi-oni 

 the rather prominent beaks somewhat retuse and nearly parallel 

 to the lower edge, thence declining in a convex slope to the 

 rounded termination ; hinder extremity more or less obtusely 

 wedge-shaped, the Hgamental edge sloping strongly, and being 

 more or less straight ; hgament sunken ; the inner disk red ; one 

 umbone projecting beyond the other. 



Var. Larger, dull, opaque, the umbones not coloured, the sur- 

 face somewhat wrinkled concentrically ; fold and flexure distinct. 



Panama, the variety from Tumbez. 



200. Tellina angulata (pi. Ixv. f. 250.) Chemnitz, vol. vi. 

 p. 89. f. 74, 75 ; Wood, Gen. Conch, p. 146. t. 43. f. 1 ; Sclu-oet. 

 Einl. vol. ii. t. 7. f . 8 ; Lutraria TeUinoides, Lam.; Deles, t.3. f. 5; 

 Hani. Des. Cat. p. 27. sup. t. 11. f. 33. 



T. testa subovaH, insequivalvi, solidiuscula, insequilaterali, cou- 

 vexa aut subventricosa, extus intusque alba, sublsevigata ; margine 

 ventrali subrecto aut convexiusculo ; dorsaH utrinque paululum 

 dechvi aut subdecHvi et subrecto, postice elevatiore, antice prope 

 nates subiucm'vato ; latere antico obtuso aut rotundato, longiore ; 

 extremitate postica obtusa, subattenuata, aut obtussime biangu- 

 lata; natibus prominentibus incurvatis, acutis; costa umbonali 

 satis distincta ; ligamento parvo, angusto, infosso ; dentibus ob- 

 soletis. 



Somewhat oval, inequivalve, tolerably strong, moderately inequi- 

 lateral, convex or subventricose, wliite both witliin and without, 

 nearly smooth ; ventral edge straightish or but sHghtly convex ; 

 anterior side the longer, its extremity rounded when the straightish 



