MYTILUS. 313 



apex, with angular, decussated, and conflu- 

 ent lines ; hinge with two teeth. 

 Mytilus confusus. Chemnitz, viii. p. 175. t. 84. f. 753. 

 Mytilus lineatus. Gmelin, p. 3359- 

 Mytilus, No. 16. Schroeter Einl. iii. p. 457- 



Inhabits 



This shell appears by Chemnitz's figure to be about ten lines 

 long, and seven broad, and the colour greenish brown with 

 a yellow margin ; the inside is pearly. 



bidens. 29. Shell oblong- wedge-shaped, longitudi- 

 nally grooved, with the summits produced 

 and remote ; hinge with one tooth. 



Mytilus bidens. Linnaus Syst. Nat. p. 1157- Bom Mus. 



p. 128. Schroeter Einl.'iii. p. 437- Gmelin, p. 3354. 

 Mytilus Magellanicus. Chemnitz, viii. p. 162. t. 83. f. 742. 

 Lister Conch, t. 356. f. 193. Petiver Gaz. t. 57. f. 9- 



Klein Ost. t. 9- f. 24. Knorr, iv. t. 30. f. 3, and vi. t. 4. 



f. 3. 

 Inhabits the Mediterranean. Linnceus. Cape of Good Hope. 

 Petiver. Coasts of America. Gronovius. Straights of Ma- 

 gellan, jy Axilla. Africa, and the West India Islands. 

 Chemnitz. South Sea. Solander. Falkland Islands. Hum- 

 phreys. 

 Shell about two inches long, and half as broad; of a brownish 

 blue colour, coated with a dark grey epidermis, and the in- 

 side silvery ; the valves are strongly grooved longitudinally, 

 and crenated at the margin. 



puniceus. 30. Shell ventricose, longitudinally 

 grooved, with the summits acuminated, and 

 the margin crenated ; hinge with four minute 

 teeth. 



Mytilus puniceus. Gmelin, p. 3362. 

 Mytilus, No. 52. Schroeter Einl. iii. p. 469- 

 L'Aber. Adanson Senegal, p. 210. t. 15. f. 2. 



Inhabits the coasts of Goree. Adanson. 



Adanson says this shell is never more than fourteen lines long, 

 and half as broad ; and is so remarkably ventricose, that the 

 depth sometimes exceeds the breadth ; it has about fifty lon- 

 gitudinal grooves ; the colour is violet or scarlet, sometimes 

 variegated with brown or green, and covered with a fulvous 

 epidermis. 



