224 



parvis, vix centralibus, lunula oblongo-cordata ; concentrice striata, 

 striis medio confertis, elevatiusculis , nonnullis utrinque obsoletis, 

 alteris postice erectis, lamellatis, productis ; area lanceolata an- 

 gusta, maryinibus regulariter lamellosis ; margine dorsali declivo ; 

 margine neutrali producto, rotundato ; intus alba. 

 Hab. Malacca {Dr. Traill). Mus. Cuming. 

 The striae are alternately obliterated towards the sides, which pro- 

 duces a crowned appearance in the middle of the valves. Like 

 D. Gruneri, Phil., it is strongly plicate ai the lozenge. 



13. Dosinia cydippe, A. Adams. D. testa solidiuscula, sub- 

 ventricosa, albida, ad umbones luteola, rotundato-cordata, con- 

 centrice striata, striis confertis, vix elevatis ; longitudinaliter ra- 

 diatim crebre striata, lunula oblongo-cordata, umbonibus Itevibus, 

 area lanceolata angusta ; intus alba ; sinu pallii impressionis ob- 

 liquo, pro/undo, apice obtuso. 



Hab. Van Diemen's Land (Mr. Gunn). Mus. Cuming. 



This is a neat-looking species, without any great distinguishing 

 peculiarity, except that, under the lens, the concentric, elevated striae 

 are finely engraved with radiating lines. 



14. Dosinia simplex, A.Adams. D. testa solida, compressius- 

 cula, subquadrato-cordata, alba, incequilaterali, concentrice striata, 

 striis confertis, incrassatis, ineequalibus, lunula oblongo-cordata, 

 umbonibus Icevibus, anteversis, area lanceolata angusta, margine 

 dorsali vix arcuato, latere postico subtruncato, subsinuato ; sinu 

 pallii impressionis lato, apice obtuso ; intus alba. 



Hab. Singapore. Mus. Cuming. 



In this species the elevated concentric striae are irregular, some 

 being more elevated than the others ; the posterior side of the shell 

 is somewhat sinuated, and the sinus of the pallial line is very wide 

 with an obtuse apex. 



15. Dosinia dilecta, A. Adams. D. testa tenui, subventricosa, 

 orbiculato-cordata, alba, lamellis concentricis, distantibus, tenui- 

 bus, postice productis erectis, ornata ; interstitiis nitidis, trans- 

 versim striatis ; lunula cordata, medio elevata ; area lanceolata 

 angusta, marginibus lamellosis; margine dorsali regulariter ar- 

 cuato ; intus alba. 



Hab. Malacca {Dr. Traill). Mus. Cuming. 



A very elegant species, of a delicate structure, with the lamellae 

 thin and wide apart ; the interstices shining and concentrically 

 striated ; and with the lozenge margined with elevated laminae. 



16. Dosinia eunice, A. Adams. D. testa solida, compressius- 

 cula, orbiculato-cordata, alba, nitida, radiatim obsolete sulcata, 

 concentrice st)'iata, striis confertis, elevatis, aqualibus, utrinque 

 erectis, sublamellaceis ; lunula triangulari, valide impressa, lamina 

 cardinali producta, acuta, area lanceolata marginibus angulatis ; 

 intus alba ; sinu pallii impressionis obliquo, profundo, angulato. 



Hab. ? Mus. Cuming. 



