230 ARCA. 



Area lacerata. Linnaus Mus. Tessin. p. 116. t. 16. f. 1. 



Chemnitz, vii. p. 1 89. t. 54. f. 536 and 537. Bruguiere 



Enc. Meth. p. 101. 

 Area barbata, Var. $. Gmelin, p. 3307. 

 Area, No. 3. Schroeter Einl. iii. p. 280. 

 Seba, iii. t. 88. f. 13. Favanne, t. 51. f. C. 5. Enc. Meth. 



t. 309. f. 2. 

 Inhabits the East Indian Seas. Chemnitz. 

 Linnaeus in the Systema Naturae has blended this species with 

 A. barbata, from which it differs in having the anterior twice 

 as broad as the posterior end, the longitudinal striae alter- 

 nately larger, and the margin crenulated. 



bicolorata. Jl. Shell transversely oval, tumid, 

 with decussated striae ; summits approxi- 

 mated and recurved. 



, Area bicolorata. Chemnitz, xi. p. 243. t. 204. f. 2007. 

 Inhabits the Red Sea on the coasts of Egypt and Arabia. 



Chemnitz. 

 This shell according to Chemnitz's figure is nearly an inch 



long, and rather more than an inch and a quarter broad, and 



of a chestnut colour, except at the umbones which are white 



and shining. 



NiVEA. 12. Shell transversely oval, ventricose, some- 

 what angulated at the anterior end, and 

 marked with longitudinal decussated ribs. 



Area nivea. Chemnitz, vii. p. 191. t. 54. f. 538. 



Area foliata. Forskael Itin. p. 31. 



Area ovata. Gmelin, p. 3307. 



Area, No. 4. Schroeter Einl. iii. p. 280. 



Inhabits the Red Sea. Forskael. 



Shell two inches and one line long, and three inches and two 

 lines broad, and Forskael says the breadth is frequently four 

 inches ; it is marked with crowded, narrow, longitudinal ribs, 

 which become stronger towards the margin ; it is white, 

 coated with a blackish hairy epidermis, and the margin is 

 often fringed with its remains ; the valves will not shut close 

 in the middle. 



cancellata. 13. Shell with cancellated striae, and 

 bearded ; margin gaping in the middle. 



Area cancellata. Gmelin, p. 3308. 



Area, No. 38. Schroeter Einl. iii. p. 294. t. 9- f- 2. 



