MYTILUS. 307 



Mytilus plicatus. Chemnitz, viii. p. 153. t. 82. f. 733. 



Gme/in, p. 3358. Montagu Supp. p. 70. 

 Mytilus, No. 8. Schroeter Einl. iii. p. 453. 



Inhabits the coasts of the Nicobar Islands. Chemnitz. 



Shell about an inch and a quarter long, and half as broad ; 

 transparent, brittle, of a dirty white colour, and the inside 

 silvery ; it is rounded on the side by the hinge, and at the op- 

 posite extremity is dilated and angular. Mr. Montagu says 

 that a shell resembling Chemnitz's figure, but only half as 

 large, has been taken alive by Mr. Laskey on the coasts of 

 the Isle of Sky. 



vulgaris. 16. Shell flattish, and inflected on one 

 side, with converging incurved summits; 

 hinge one- toothed. 



Mytilus vulgaris. Chemnitz, viii. p. 153. t. 82. f. 732. 



Gmelin, p. 3358. 

 Mytilus, No. 7. Schroeter Einl. iii. p. 452. 

 Favanne, t. 50. f. D? Eric. Melh. t. 2 1 8. f.4. 



Inhabits the coasts of the West India Islands. Chemnitz. 



Shell about an inch long, and rather more than half as broad ; 

 smooth, of a pale clay colour, and covered with a brown epi- 

 dermis ; summits incurved and approximated. 



niveus. 17. Shell oval, sub-diaphanous, thickly 

 striated longitudinally, and the margin acute; 

 hinge with two teeth. 



Mytilus niveus. Chemnitz, viii. p. 154. t. 82. f. 734. Gme- 

 lin, p. 3358. 



Mytilus, No. 9. Schroeter Einl. iii. p. 453. 

 Inhabits the coasts of the Nicobar Islands. Chemnitz. 

 Shell about an inch and three quarters long, and three quarters 



of an inch broad ; of a snow white colour on both sides, and 



the inside polished. 



bilocularis. 18. Shell ovate-wedge-shaped, with 

 longitudinal diverging striae; anterior side 

 rounded, and the other flat ; summits vault- 

 ed, with a white internal appendage. 



Mytilus bilocularis. Linnaus Syst. Nat. p. SS52. Schroe- 

 ter Einl. iii. p. 431. Gmelin, p. 3352. 

 Mytilus Nicobaricus. Chemnitz, viii. p. 155. t. 82. f. 736. 

 Variety. Shell smaller, and sub-ti iangular. 



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