23G 



simS, sublaevigata, rosea, radio pallidiore postico plerumque notata ; 

 margine ventrali autice arcuate, postice flcxuoso et sursum accli- 

 nato ; dorsali utrinque vix minime declivi, prope nates acutas 

 subretuso, deinde siibrecto aut paululum couvexiusculo ; latere an- 

 tico longiore, ad extremitatem rotundato ; postico angusto, acumi- 

 nato, rostrato ; ligamento iiifosso ; iiexiira costaqne umbonali con- 

 spicuis ; dentibus lateralibus parvis, tenuibus, sequidistantibus. 



Var. riavo-aurantia. 



Much elongated, compressed, tliin, subpeUucid, polished, rose- 

 coloured, Math usually a paler posterior ray, nearly smooth, or with 

 minute radiating and concentric strise ; ventral edge arcuated in 

 front, flexuous and greatly elevated beliind ; dorsal edge scarcely 

 at all sloping in front, rather more so posteriorly, subretuse near 

 the acute beaks, and then straightish or very shghtly convex ; an- 

 terior side the longer, rounded at its extremity; posterior side 

 forming a narrow acuminated beak ; hgameut suidi;en ; fold and 

 flexure conspicuous ; lateral teeth tlnn, small, and equidistant. 



Var. Rich yellow. 



YeUow var. Isle of Zebu. 



As this is not the Rostrata of Linnseus, I have adopted the other 

 name proposed by Chemnitz '' Rostrata seu Vulsella" . 



28. Tellina perna (pi. Ixiii. f. 203, 217, 219.) Spengler, 

 Schrivt. Naturhis. Gelstav. Kiobenha. 4. (1798). T. paUescens 

 Dil. Des. Cat. p. 84. T. sulphurea and latirostra Lam. no. 10, 

 11. Haul. Des. Cat. p. 62. T. incarnata Bom p. 36. t. 2. f. 12. (er- 

 roneously quoted as 11 in text). T. rostrata flavescens Che7n. 

 vol. vi. f. 104. T. latirostra, Sivain. Zool. III. 2nd ser. vol. i. t. 20. 



T. testa oblongo-elongata, tenuiuscida, convexa, subpellucida, 

 nitida, sublsevigata, alba, flava, aurantia aut rosea, radio ]>allidiore 

 postico plerumque ornata ; margine ventrah antice arcuato, postice 

 sursum decHvi ; dorsaK antice vix decHvi, couvexiusculo, postice 

 paululmn dechvi, prope nates conspicuas subincurvato, mox cou- 

 vexiusculo ; latere antico longiore, subproducto ; postico rostrato ; 

 extremitate postica obtuse angulata ; umbonibus subtumidis ; hga- 

 mento infosso; margine cardinalis interno, angusto, caUo liga- 

 mentali munito ; deutibus lateraHbus tenuibus, inconspicuis, sequi- 

 distantibus. 



Elongated-oblong, rather tliin, semitransparent, convex, glossy, 

 very variable in colouring, being sulphur-yeHow, wliite, pink with 

 or without paler rays, orange with wliite rays, or orange flesli-co- 

 lom-ed, &c., nearly smooth, often with obsolete radiating striulse, 

 which are more evident posteriorly ; ventral edge arcuated in front. 



