PINNA. 



Plate V. 



Species 7. (Mus. Cuming.) 



Pinna kigida. Fwm. testa mbpyriformi, obscure costet- 

 latd, squamatd, sqiiamis paucis, brevibus, latere antico 

 rude decassalim. ruijoso ; fmeo-olwaced. 

 The rigid Pinna. Shell somewhat pear-shaped, ob- 

 scurely ril)bed, scaled, scales few, short, anterior side 

 rudely decussately wrinkled ; fuscous-olive. 

 DiLLWYN, Descriptive Catalogue of Shells, p. 327. 



Hai,. ? 



Characterized by a pear-shaped gi-owth, dark fuscous- 

 olive colour, and irregular sculpture of promiscuous, short, 

 broken scales. 



Species 8. (Mus. Cuming.) 



Pinna incurvata. Finn, testa lanceolato-Jlabelti/orm, 

 lateribiis subincurvatis, medio carinatd, utrinque regu- 

 hiriter declivi, IcBvigatd, livido-cinered, subvitred, an- 

 tice oblique concentrice corrugatd, postice iransversini 

 fettice ruffosd. 



luE INCURVED Pinna. Shell laaceolately fan-shaped, 

 keeled in the middle, regularly sloping on each side, 



smooth, livid-ash, glassy, anteriorly obliquely wrinkled, 



posteriorly transversely finely rugose. 

 Chemnitz, Conch. Cab. vol. viii. p. 229. pi. 90. f 778. 

 Hab. Moluccas. 



Readily distinguished from all other species by its lan- 

 ceolate form and thin, livid-ash, brittle substance. 



Species 9. (Mus. Cuming.) 

 Pinna Eumphii. Finn, testd gracili-trigond, cnrvatd, 

 medio carinatd, iitringtie plano-declivi, pallide cinered, 

 subpelhicidd, obscurissime longitudinaliler liratd et pe- 

 cidiaritei- malleafd, antici valide oblique corrugatd. 

 RuMPHius's Pinna. Shell slenderly triangular, curved, 

 keeled in the middle, flatly sloping on each side, 

 pale-ash, rather transparent, very obscurely longitu- 

 dinally ridged and peculiarly malleated, anteriorly 

 strongly obliquely wrinkled. 

 Hanley, Pro. Zool. Soc. 18.58. 

 Hab. Moluccas. 



Very closely allied to the preceding species, but uni- 

 formly smaller and more curved, whilst the surface is cu- 

 riously finely malleated. 



April, 1858. 



