85 



Area sulcata 



Area lactea 



ovata 



• • • • trapezina 



• • • • barbata 



pistachia 



fusca 



• • • • pisolina 



• • • • Magellanica 



cancelJaria 



• • • • Domingensis 



callifera 



Area irudina. 



Superior Margin crenulated within. 

 Area Helbingii Area Indica 



• • • • scapha 



senilis 



antiquata 



• • • • Brasiliana 



• • • • rhombea 



eorbicula 



granosa 



• • • • squamosa 



auriculata 



Cayenensis 



♦• •• inequivalvis 



• • • • bisulcata 



[And nine 



fossil species.] 



PECTUNCULUS. 



ARC A GLYCIMERIS. LitmCBUS. 



Mawes Linn. pi. 13, f. 7. 

 These shells were blended by Linnaeus with his G. Ar- 

 ea, to which in some respects they appear allied; ne- 

 vertheless, their constant form, and the character of 



