PANDORA. 



Species 16. (Fig. a, b, Mus. Sowerby.) 



Pandor.\ fle.\uosa. Pan. testa parud, hreciusmld, 

 tortuosd ; latere antico subacuminato ; latere postico 

 attenuato, rostrato, margine dorsali declivi, arcuato, 

 ad terminum elevato, margine terminali truncato ; 

 valvd sinistrd profunda, flexiiosd ; ante rostrum 

 contractd ; costis duahus rostralibus validis. 



The flexuous P.\ndora. Shell small, rather short, 

 tortuous ; anterior side slightly acuminated ; 

 posterior side attenuated, beaked, dorsal margin 

 sloped, arched, raised at the end, terminal margin 

 truncated ; left valve deep, flexuous, contracted 

 in front of the beak ; two strong rostral ribs. 



SowERBY. Genera of Shells, No. 2. 



Hah. Arabian Gulf. 



This beautiful littlu species is seldom met with. 



Species 17. (Mus. Sowerby.) 



Pandora delicatula. Pan. testa parvd, tenttissimd, 

 depressd, medio concentrice leviter rugatd, hreviics- 

 culd; antice angustd, postice ad marginem veniralem 

 cxpansd ; ante rostrum leviter contractd ; rostra 

 lata, depresso, lati truncato, margine dorsali recto. 



The delicate Pandora. Shell small, very thin, de- 

 pressed, slightly concentrically wrinkled in the 

 middle, rather short ; anteriorly narrow, pos- 

 teriorly expanded at the ventral margin ; a little 

 contracted in front of tlie beak ; beak broad, 

 depressed, broadly truncated, dorsal margin 

 straight. 



A. Adams. Proc. Zool. Sec. 



Ilah. Japan. 



The specimens from which the figure is taken are 

 young, and I have seen no others. 



Species 18. (Mus. ? copied.) 



Pandora nasuta. Pan. testd subovatd, arcuatd, medio 

 subexpansd ; latere antico subcuneaio, margine 



November, 1874. 



dorsali svhalato, dedivi ; latere postico versiis 

 teriainum attenuato, conspicue rostrato; margine 

 dorsali arcuato, margine ventrali ante rostrum coii- 

 tracto, medio convexo. 



The nasute Pandora. Shell subovate, arched, slightly 

 expanded in the middle ; anterior side a little 

 cuneate, with dorsal margin slightly alate, sloped; 

 posterior side attenuated towards the end, con- 

 spicuously beaked ; dorsal margin arched, ventral 

 margin a little contracted in front of the beak, 

 convex in the middle. 



SowERBV. Species Coachyliorum, figs. 18, 19. 



Hub. ? 



The shell is described in the above work as one of 

 extreme rarity, and as the specimen in the British 

 Museum to which the name is attached does not well 

 agree with the description and original figure, I have 

 thought it best to copy the latter. 



Species 19. (Fig. a, b, Mus. Brit.) 



Pandora Ceylanica. Pan. testd altd, compressd, dola- 

 brifonni, arcuatd, solidiilsculd, suba:quilaterali, 

 concentrice undulatd ; intus laminis cardinalibus, 

 undfomicatd, radiatd ; latere antico acclivi, mar- 

 gine dorsali subalato ; latere postico ad marginem 

 ventralempi-oducto; ante rostrum contracto, margine 

 dorsali profundissime arcuato ; rostro angusto, 

 producto, costd duplicatd rostrali validd, angustd; 

 vahis subeequaliter planulatis. 



The Ceylon Pandora. Shell elevated, compressed, 

 hatchet-shaped, arched, rather solid, nearly equi- 

 lateral, concentrically undulated, rayed within 

 with cardinal layers, one vaidted ; anterior side 

 sloped upwards, dorsal margin slightly alate; 

 posterior side produced at the ventral margin; 

 contracted in front of the beak, dorsal margin 

 very deeply arched ; beak narrow, produced, 

 double rostral rib strong, narrow ; valves almost 

 equally flat. 



Sowerby. Proc. Zool. Soc, 1835. 



Hab. Ceylon. 



