PINNA. 323 



nigra. 2. Shell ovate, ventricose, with the margin 

 rounded on both sides, and striated longitu- 

 dinally. 



Pinna nigra. Chemnitz, viii. p. £21. t. 88. f. 774, and 



Vign. 15. f. A. 

 Pinna rudis, Var. Linnaus Syst. Nat. p. 1159. Schroeter 



Einl. iii. p. 474. Gmelin, p. 3363. 

 Pinna nigricans. Solanders MSS. Portland Cat. p. 147. 



lot 3342. 

 Rumphius, t. 46. f. L. Petiver Arab. 1. 19. f. 6. Gualter, 



t. 81. f.'A. Enc. Method, t. 199- f. h 

 Inhabits the coasts of Amboyna. Rumphius. Red Sea. 



Chemnitz. Otaheite. Humphreys. 

 Shell about sixteen inches long, and a foot broad, of a blackish 

 colour both inside and out ; it has sometimes, but not con- 

 stantly, a few remote vaulted scales towards the margin. 

 The shells of this Genus vary so much, and approach each 

 other so closely, that it is often very difficult to define the 

 species, but there is to the full as much difference between 

 this shell and P. rudis, as exists between many others which 

 Linnaeus has arranged separately. 



ingens. 3. Shell sub-triangular-ovate, slightly in- 

 curved towards the summit, with irregularly 

 scaly wrinkles, and interrupted longitudinal 

 striae. 



Pinna ingens. Pennant Zool. iv. p. 115. Motitagu Test. 

 p. 180, and Supp. p. 72. Maton and Rqcket, in Lin. 

 Trans, viii. p. 112. 

 Pinna laevis. Donovan, v. t. 152. 



Inhabits the coasts of the Hebrides. Pennant, fyc. 



Shell about a foot long, and seven inches broad, of a dark horn 

 colour ; Mr. Montagu, who has given a long account of this 

 species, says, that from the summit run a few interrupted 

 striae, which crossing the wrinkles form on the broader part 

 of the shell, a few distant concave spines. 



pectinata^ 4. Shell sub-triangular-oblong, longi- 

 tudinally ribbed on one side, and obliquely 

 wrinkled on the other. 



Pinna pectinata. Linnaus Syst. Nat. p. 1 1 60. Chemnitz, 

 viii. p. 213. t. 87. f. 770. Schroeter Einl. iii. p. 475. 

 Gmelin, p. 336S. Montagu Test. p. 178. Maton and 



