PINNA. 



Plate XIX. 



Species 35. (Mus. Cuming.) 

 Pinna thuncata. Finn, tesid riide fiadellatd, subventri- 

 cosd, lenui, livido-oUvaced, semipellucidd, radio tim 

 liraid, lirif mbangustis, regularihm, interstiUis con- 

 cavis, liris anticls tennioriiua, margine postico squa- 

 malo. 

 The teuncated Pinna. Shell rudely fan-.shaped, rather 

 ventricose, thiu, livid-olive, semitransparcut, radiately 

 ridged, ridges rather narrow, regular, interstices con- 

 cave, anterior ridges thinner, posterior edge scaled. 

 Philippi, Enum. Moll. vol. ii. p. 54. pi. 16. f. 1. 

 Hab. Mediterranean. 



A thin, semitransparent, olive shell, sculptured regu- 

 larly throughout with narrow ridges, which are thinner on 

 the anterior side. 



Species 36. (Mus. Cumiug.) 



Pinna vexillum. Finn, testa trigono-flabellatd, medio 

 subveniricosd, radiatim liratd, liris parvis, valde ir- 

 regularibm, irregnlariter muricato-squainatU, latere 

 antico promiscm rugoso-driato ; nigra, versus mur- 

 gines ferrugined. 



The flag Pinna. Shell triangularly fan-shaped, -some- 

 what ventricose in the middle, radiately ridged, 

 ridges small, very irregular, irregulariy prickly-scaled, 

 anterior side promiscuously rugosely striated ; black, 

 rusty towards the edges. 



BouN, Mus. Vindobonensis, pi. 7. f. 8. 



Hab. Amboyna. 



A black, rusty-edged shell, ridged and prickly-scaled 



with singular irregularity. 



