172 MELVILL : MOLLUSCA OF S. CAROLINA AND FLORIDA. 



Fam. ARCIBJS. 



168. Area Noee, (L.) 



Key West; I assume this to be the same form as the 



Mediterranean species. 



169. Barbatia sp: — 



Key West, not in good condition. 



170. Scapharca incongrua, (Say). 



Charleston Harbour. 



171. S. iricequivalvis, (Brug.) or allied species. 



Key West, South Florida. 



172. S. occidentalis, (Phil.) 



Southern shores of Key West. 



173. Pectunculus pectiniformis, (Lamk.) 



Key West, South Florida. 



174. Argina pexata, (Say). 



South Carolina. 



175. A. Americana, (Gray). 



Charleston Harbour, more abundant than the last. 



Fam. PECTINID^. 



176. Pecten circularis, (Sowb.) 



Cedar Keys. 



177. Lima scabra, (Born). 



Key West. 



171. Spondylus ramosus, (Reeve). 

 Key West, common. 



Fam. OSTREID^. 



179. Ostrea frons, (L.) 



On Mangrove stems, etc., Key West. 



180. O. rhizophorse, (Gray). 



On Mangrove stems, etc.. Key West. 



J.C., iii., April, 1881 



