PINNA. 



Species 18. (Mus. Cuming.) 



PlN.NA FLAHELLUM. Pj/iH. testd iriffotid, versus umhoiies 

 siibcontracld, radiatim rosiatd, costis tuhulato-sqnama- 

 (ii, sguamis duiaritibus, erectis ; olivaceo-corned, au- 

 runiio-riifo tincid. 



The little ean Pinna. Shell triangular, rather con- 

 tracted towards the umboes, radiately ribbed, ribs 

 tubularly scaled, scales distant, erect ; olive-iinniy, 

 tinged with orange-red. 



Lamarck, Aniin. saus vert. vol. vii, p. 61. 



Pinna hand ignobUk, Chemnitz. 



Hab. ? 



A light olive-horny shell, of a compact triangular I'orm, 



contracted into a fan-shape towards the umboes, rather 



distantly ribbed, the ri!)s being surmounted with nearly 



erect tubular scales. 



Species 19. (Mus. Cuming.) 



Pinna rudis. Finn, testd rude Jlabeiliformi, tenulculd, 

 subventricosd, obscure costatd, eostis sguamiferis, sgtca- 

 mis magnis, irregularibus, semitubulom ; aurantio-ru- 

 bente. 



The rude Pinna. Shell rudely fan-shaped, rather thin, 

 somewhat ventricose, obscurely ribbed, ribs scaled, 

 scales large, irregular, semitubular ; orange-red. 



Linn. BUS, Syst. Nat. p. 11.59. 



Hab. West Indies. 



This fine species is distinguished by its very irregular, 

 blistered growth, and deep orange-red colour. The scales, 

 which are large and seniitubuhir, are also of a rude, irregu- 

 lar growth. 



May, 18.58. 



