314 MYTILUS. 



demissus. 31. Shell oblong, longitudinally striat- 

 ed except on the anterior side next the hinge, 

 and the summits rounded and approximated. 

 Mytilus demissus. Solander's MSS. 

 Lister Conch, t. 358. f. 196. Enc. Method, t. 220. f. 5. 

 Inhabits the coasts of Carolina. Lister. Virginia, and other 



parts of North America. Solander. 

 Shell about three inches long, and an inch and a quarter broad ; 

 of a silvery white colour, covered with a dark brown epider- 

 mis ; the valves are covered with strong longitudinal striae, 

 except a small space on the anterior side below the hinge 

 which is nearly smooth ; the margin is crenated, and the in- 

 side white indistinctly rayed with purple. 



modiolus. 32. Shell oblong, gibbous, smooth, with 

 the posterior side dilated, and elevated above 

 the hinge; apex rounded. 



Mytilus Modiolus. Linn&us Syst.Nat. p. 1158. Pennant 



Zool. iv. p. 113. t. 66. f. 77. Da Costa Brit. Conch. 



p. 2 19. t. 15. f. 5. Born Mus. p. 128. Muller Zool. 



Dan. ii. p. 16. t. 53. Chemnitz, viii. p. 178. t. 85. f.757 



to 759, and xi. p. 253. t. 205. f. 2020 and 2021. Schroe- 



ter Einl. iii. p. 439. Gmelin, p. 3354. Donovan, i. 



t. 23. Montagu Test. p. 163. Maton and Racket, in 



Lin. Trans, viii. p. 107. Dorset Cat. p. 40. 

 Mytilus rusticus. Solander's MSS. Callone's Cat. p. 43. 



No. 791- 

 Mytilus. Enc. Meth. t. 219. f. 1. 

 Modiola Papuana. Lamarck Syst. des Anim. p. 113. 



Leach Zool. Misc. ii. p. 33. 

 Modiola Americana. Leach Zool. Misc. ii. p. 32. t. 72. 



f. 1.? 

 Le Lulat. Adansoh Senegal, p. 207. 1. 15. f. 1. 

 Lister Conch, t. 359- f. 198, and t. 1057. f. 5. Petiver 



Gaz. t. 71. f. 11. Knorr, iv. t. 15. f.3. Favanne, t. 50. 



f. B. 

 Variety. With a deep umbilicus under the summit. 

 Mytilus umbilicatus. Pennant Zool. iv. p. 112. t. 65. f. 76. 



Donovan, ii. t.40. Montagu Test. p. 164, and Supp. 



71. Maton and Racket, in Lin. Trans, viii. p. 109. 

 Mytilus curvirostratus. Da Costa Brit. Conch, t. 220. 

 Junior. Mytilus barbatus. Linnaus Syst. Nat. p. 1156. 



Chemnitz, viii. p. 168. t.84. f. 749- Schroeter Einl.ni. 



p. 433. Gmelin, p, 3353. Donovan, ii. t. 70. Mon- 



