PINNA 



PiNNJ 



Species 4. (Mus. Cumiug.) 

 NIGUA. Finn, testa, trigono-flabellatd, versit.s 



boms atteimald, lirig Jlexuom obscure radiatd, vel 

 laevigata vel squaniatd, nquamis amplk distantibus, re- 

 curvo-erectis ; nigra. 

 The black Pinna. Shell triangularly fan-shaped, atte- 

 nuated towards the iimboes, obscurely rayed with 

 fiexuous ridges, smooth or scaled, scales large, dis- 

 tant, recurvedly erect ; black. 

 CuEMNiTZ, Conch. (Jab. vol. viii. p. 221. pi. 88. f. 774. 

 Pinna nigrina, Lamarck. 

 Hab. South Seas and Piiilippiiic Islands ; Cuming. 



This well-defined species varies materially in sculpture, 

 being sometimes unusually strongly scaled and sometimes 

 smooth and of large size. It is not often that specimens 

 occur with such boldly developed scales as in the shell 

 here figured. Of the large, smooth variety there are some 

 remarkable specimens in the British Museum. 



Species 5. (Mus. Cuming.) 

 Pinna inflata. Finn, testa oblique irigond, sublorld, 

 tenui, valdi injiatd, laevigata, liris nt.i?itctis obscure ser- 

 ratis radiatd, antice profuse mimitissime serrato-squa- 

 mails, margine cardinali muricato-squamaio, nquamis 

 panels grandibus ; olivaceo-corned. 

 The inflated Pinna. Shell obliquely triangular, some- 

 what distorted, thin, very inflated, smooth, rayed with 

 minute, obscurely sen'ated ridges, anteriorly very mi- 

 nutely serrately scaled, hinge-margin prickly-scaled, 

 scales few, large ; olive-horny. 

 Chemnitz, Conch. Cab. vol. viii. p. 215. pi. 8. f. 771. 

 Hab. Philippine Islands ; Cuming. 



This is a very distinct species from the Linnean P. 

 pectiiiata of our European shores, with which it is con- 

 founded by Lamarck. It is singularly inflated, and, though 

 apparently smooth will be found on examination to be 

 crowded on the anterior side with very minute appressed 

 scales, and to be rayed with minute serrated ridges. 



March, 1858. 



