Bay of Bengal and the Arabian Sea. 1G9 



along the concave curve, which is not so round as the opposite 

 side, and ahiiost defined by lateral angles. 



22. Cytherea (Caryatis) pudicissima. (PL V. figs. 3, 4.) 



Testa parva, inaequilateralis, ovata, mediocriter convexa, alba, 

 coucentrice fortiter striata ; margo dorsi posticus leviter obliquus, 

 rectiusculus, anticus valde declivis, brevior ; margo veutralis 

 regulariter et late curvatus ; umboues parvi, baud coiitigui, 

 incurvati ; lunula elougato-cordata, iu medio promineus, in- 

 crementi lineis striata, linea imprcssa circumscripta ; area nulla ; 

 cardo normalis, mediocriter fortis ; pagiua interna alba, laevis ; 

 cicatrices baud couspicuae, pyriformes ; siuus pallii baud pro- 

 fundus, obtuse cuneatus. 



Longit. 13 millim., alt. 10"3, diam. 7. 



Hab. OfF Ganjara coast, 24 miles south-east of Gopalpur, 

 in 89-93 fathoms. 



This species in colour and sculpture is very like Dione 

 pura^ Deshayes *, from Callao in Peru, but differs from it in 

 form, being less trigonal, and not narrowed posteriorly. The 

 urabones also are less prominent and not quite so anterior in 

 position. 



23. Abra maxima^ Sowerby. (PI. V. figs. 5, 6.) 



Syndesmya maxima, Sowerby, Proc. Malac. Soc. 1894, vol. i. p. 40, 

 pi. V. fig. o. 



Testa fere a;quilateralis, utrinque biaus, oblonga, antice rotundata, 

 postice acuminata, albida, nitida, lineis increment! tenuissimis 

 striata, striisque paucis radiantibus baud conspicuis sculpta ; 

 margo dorsi utrinque rectiuscidus, declivis, veutralis late excur- 

 vatus; umboues parvi, acuti ; lunula lanceolata, leviter excavata, 

 utrinque carina marginata ; valvae tenues, dextra carina ab um- 

 bone usque ad extremitatem posticam instructa, sinistra sulco 

 minime profundo in eodem loco sculpta ; dentes cardinales sub- 

 aequales, laterales valvae dextrte tenues, eequidistautes ; ligamen- 

 tum internum perobliquum, externum teuue, angustum ; pagina 

 interna nitida, iridescens, radiatim et transversim substriata ; 

 cicatrix anterior angusta, elongata, postica latior, pyriformis ; 

 sinus pallii profundissimus, angustus, ad extremitatem rotun- 

 datus. 



Longit. 33 millim., alt. 20, diam. 10. 



Hob. Bay of Bengal, in 128 fathoms, dead shells only j off 



* Cat. Conch. Biv. Mus. Brit., Veneridfe, p. 68; Homer, Monogr. Cy- 

 therea in Novitat. Conch, p. 81, pi. xxiii. figs. 1-1 b. 



