332 PINNA. 



Pinna digitiformis. Linnaeus Syst. Nat. p. 1160. Gmelin, 

 p. 3365. 



Inhabits the Indian Ocean. Linnaus. 



This shell was described by Linnaeus from the museum of the 

 Queen of Sweden, and no author has since been able to as- 

 certain the species ; it is said to be flattish, oblong, and pel- 

 lucid. 



lobata. 20. Shell unarmed and lobed. 



Pinna lobata. Linnaus Syst. Nat. p. 11 60. Gmelin, p. 



3366. 

 Inhabits the Indian Ocean. Linnaus. 

 This species as well as the foregoing is at present unknown, 

 and is said to be of a straw colour, ornamented with purple 

 lines, membranaceous, and heart-shaped when the valves are 

 open ; the lateral lobes rounded and broader, with a nerve 

 running from the hinge to the lobes, and lateral lines pro- 

 ceeding from the nerve. 



