A RCA 235 



Area, No. 9. Schroeter Einl. iii. p. 282. 

 Lister Conch, t. 232. f. 66. 



Variety. With the anterior end truncated. 

 Area inzequivalvis. Bruguiere line. Meth. p. 106. 

 Area, No. 12. Schroeter Einl. iii. p. 284. 

 Area rhomboidalis. Chemnitz, vii. p. 210. t. 56. f. 552. 

 Enc. Meth. t. 305. f. 3 h. 



Inhabits the coasts of Coromandel and Tranquebar. Chem- 

 nitz. 



Shell about three quarters of an inch long, and twice as broad ; 

 but the variety is less produced, and rather truncated at the 

 anterior end, so that its breadth is smaller in proportion to 

 the length ; one valve is larger, so as to project at the margin 

 beyond the other ; the colour is whitish. 1 am unacquainted 

 with the A. rhomboidalis of Chemnitz, which I have fol- 

 lowed Gmelinin placing as a variety, and which, from the 

 figure, appears to be larger, and probably a distinct spe- 

 cies. 



corbula. 22. Shell ovate, with longitudinal, no- 

 dulous, rather spinous, sub-triangular ribs; 

 Summits obtuse and approximated; margin 

 erenulated. 



Variety A. Somewhat compressed. 



Area corbula. Chemnitz, vii. p. 222. t. 56. f. 558. 



Area corbicula. Gme/in, p. 3310. 



Area, No. 14. Schroeter Einl. iii. p. 285. 



Variety B. Somewhat ventricose. 

 Area granosa minor. Chemnitz, vii. p. 222. t. 56. f. 559. 

 Area aculeata. Bruguiere Enc. Meth. p. 107. 

 Area carinata. Solanders MSS. 

 Area, No. 15. Schroeter Einl. iii. p. 285. 

 Lister Conch, t. 234. f. 68. Klein Ost. t. 10. f. 43 and 

 44. Enc. Meth. t. 309- f. 5. 



Inhabits the coasts of the Nicobar Islands. Chemnitz. Cape 

 of Good Hope. Bruguiere. 



Shell about ten lines long, and rather more than an inch broad; 

 white or brownish, with a tinge of blue both inside and out 

 at the anterior end ; it has about twenty-two somewhat trian- 

 gular longitudinal ribs, with four or five conical nodules or 

 spines on each ; the two shells figured by Chemnitz appear 

 to differ only in the valves of the one being more compressed 

 than in the other. 



