304 MYTILUS. 



extremity of each valve, crossing each other like the man- 

 dibles of the Loxia curvirostra, distinguish this species from 

 M. lithophagus, of which however Dr. Maton considers it 

 to be only a variety. 



ambiguus. 9. Shell oblong-, smooth, rounded at 

 both ends, and gaping on one side. 

 Mytilus Pholadius. Solanders MSS. 

 Mya dubia. Pennant Zool. iv. p. 82. t. 44. Donovan, iii. 



t. 108. Dorset Cat. p. 27. t. 1. f. 11. Maton and 



Racket, in Lin. Trans, viii.p. 33. Wood's Conch, p. 102. 



t. 25. f. 2 and 3. 

 Mya Pholadia. Montagu Test. p. 28 and 559, and Supp. 



p. 20. 

 Pholas Faba. Pulteney's Dorset Cat. p. 27. 

 Chama parva. Da Costa Brit. Conch, p. 234. 

 Inhabits the coast at Weymouth burrowed in stone. Pulteney. 



Coasts of Devonshire. Montagu. 

 Shell about the size of a Pistachia Nut ; thin, brittle, opake, 

 marked with concentric striae, and of a pale brown colour. 

 Mr. Montagu remarks that the small elevation of the hinge 

 is scarcely to be denominated a tooth, and it is altogether 

 unnoticed by Solander, whose MS. description appears to 

 have been taken from the same specimen in the Portland Ca- 

 binet, which Pennant mentions. 



rugosus. 10. Shell oval, sub-rhomboidal, rounded 

 at one and truncated at the other end, and 

 strongly wrinkled transversely. 

 My tilus rugosus. Linnaus Syst. Nat. p. 1 1 56. Pennant 

 Zool. iv. p. 1 10. t. 63. f. 72. Da Costa British Conch. 

 p. 223. Schroeter Einl. iii. p. 429. t. 9. f. 14. Qmelin, 

 p. 3352. Montagu Test. p. 164. Donovan, iv. t. 141. 

 Maton and Racket, in Lin. Trans, viii. p. 105. Dor- 

 set Cat. p. 39- t. 13. f. 5. 

 Mytilus Pholadis. Linnaus Mant. p. 548. Chemnitz, 

 viii. p. 154. t. 82. f. 735. Schroeter Einl. iii. p. 448. 

 Gmelin, p 3357. Mohr Hist, Nat. hlandia, p. 135. 

 Mutler Zool. Dan. iii. p. 11. t. 87. f. 1 to 3. 

 Mya bvssifera. Fabricius Fauna Grotnl. p. 408. Gmelin, 



p. 3323. 

 Lister Anim. Ang. t. 4. f. 21. Linnceus Iter. Westgoth. 

 t. 5. f. 2. 

 Inhabits the northern coasts of Europe, burrowed in lime-stone, 



