PANDORA. 



Species 9. (Mus. Erit.) 



Pandoua liADiATA. fall, tcstd scTnirotuiuld, opacd; 

 marjine venlrali convexo ; latere antico hrevi, 

 margiiie tlorsali subtiis ttmbones excavato, ad terrni- 

 num cuneato ; latere postico versils rostrum sub- 

 attenuato ; rostro hrevi, truncato ; valvd dextrd 

 planulatd, radiatim sulcata, stilcis nibris, lineari- 

 bus ; valvd sinistra convexa; costd dorsali validd. 



The kaykd Pandoua. Shell half-round, opaque ; 

 ventral margin convex ; anterior side short, dorsal 

 margin excavated beneath the umboes, cuneated 

 at tlie end ; posterior side a little attenuated 

 towards the beak ; beak short, truncated ; right 

 valve flat radiately grooved, grooves red, linear; 

 left valve convex, dorsal rib strong. 



SowERHY. Proc. Zool. Soc, 1835. 



Hub. ? 



Species 10. (Fig. a, b, Mus. Brit.) 



Pandora filosa. Pan. tesld semiovata, opacd, marginc 

 ventrali medio convexo, utrinque attenuato, acu- 

 minata ; marfjine dorsali recto ; latere antico ad 

 marijinem ventralem sinuosim contracto ; latere 

 postico ant'e rostrum attenvato, contracto ; rostro 

 producio, ad tcrninum tnincato ; valvd sinistrd 

 moderate convexa. 



The threaded Pandora. Shell semiovate, opaque, 

 ventral margin convex in the middle, attenuated 

 and acuminated at each end ; dorsal margin 

 straight ; anterior side sinuously contracted at the 

 ventral margin ; posterior side attenuated and 

 contracted in front of the beak ; beak produced, 

 truncated at the end ; left valve moderately 

 convex. 



Carpenter. Proc. Zool. Soc, 



Hab. Puget's Sound. 



Species 11. (Fig. a, b, Mus. Brit.) 



Pandora Cdmingii. Pan. testa compressd, obliqiin, 

 arcuald ; latere antico angusto, elevato ; latere 

 postico lato, producto, rostrato, margine dorsali 

 profundi arcuato, ad terminum elevato, margine 

 ventrali expanso, ante rostrum contracto. 



Cl'.ming's P.Uv'Dora. Shell compressed, oblique, 

 arched; anterior side narrow, raised; posterior 

 side produced, beaked, dorsal margin deeply 

 arched, raised at the end, ventral margin expanded, 

 contracted in front of the beak. 



Hanley. Proc. Zool. Soc, 1861. 



Hab. Philippines. 



An extraordinarily formed shell belonging to the 

 same group as P. Cei/lanica, &c. 



Species 12. (Mus. Brit.) 



Pandora brevifrons. Pan. tcstd tennissiind, elongatd, 

 rectd, angustd ; latere antico hrevi, subacuminato, 

 margine dorsali elevato; latere postico prodncto, 

 leviter rostrato, margine dorsali vix arcuato ; valvd 

 sinistrd convexd, valvam dextram ad marginem 

 ventralem sujieranti. 



The short-fronted Pandora. Shell very thin, elon- 

 gated, rather straight, narrow ; anterior side short, 

 rather acuminated, with dorsal margin raised ; 

 posterior side produced, slightly beaked, dorsal 

 margin very little arched ; left valve convex, 

 overlapping the right valve at the ventral margin. 



SowERBY. Proc. Zool. Soc, 1835. 



Hab. ? 



Longer, straighter, and thinner than P. oblonga. 



November, 1874. 



