FINN A. 



Plate IX. 



Species 16. (Mus. Cuming.) 

 Pinna bullata. Finn, testa obliqm trigona, marghie 

 decUm-rotundatd, tenui, subpellucida, radiatim coslaid, 

 costis grmlatim latioribus ; mrdide alba, verms urn- 

 bones aurantio-rufd. 

 The bubble-like Pinna. Shell obliquely triangular, 

 slopingly rounded at the margin, thin, semitraiispa- 

 rent, radiately ribbed, ribs gradually broader ; dead- 

 white, orauge-red towards the umboes. 

 SwAiNSON, Hanley, MS., Mus. Cuming. 

 Hal. Moluccas. 



Of light, horny substance, tinged with orange-red to- 

 wards the umboes. The ribs radiate to the margin, but 

 become gradually broader and almost superficial. 



Species 17. (Mus. Cuming.) 



Pinna bicolor. Finn, testa eUnigatd, margiite deelici- 

 rotundatd, radiatim costatd, costis angmtin, si(bobsolelis, 

 panto Jkxiwsis, interstitiis parunt concavis ; lieido- 

 cinered, subpellucidd, olivaceo-nigricante radiMd. 



The two-colouked Pinna. Shell elongated, slopingly 

 rounded at the margin, radiately ribbed, ribs narrow, 

 rather obsolete, a little flexuous, interstices but little 

 concave ; livid-ash, somewhat transparent, rayed with 

 olive-black. 



Chemnitz, Conch. Cab. vol. viii. p. ^34. pi. 90. I 7S(l. 



Finna dolabrata, Lamarck. 



Uab. Malacca. 



This fine species is chiefly characterized by its biai'k- 



rayed painting. 



