68* DAVENPORT ACADEMY OF NATURAL SCIENCES. 



*Unio modioli for in is Lea. Florida, without locality, Upson. 



Unio bissellianus Lea. Dry Branch, with Unio hebes, Manatee 

 County. 



Anodonta couperiana Lea. Miakka Upper Lake, Manatee County, 

 young; Orange County, Pilsbry, adult. 



Nucula eborea Con.? Dredged in Tampa Bay. Odd valves found 

 in several localities in the vicinity of Tampa Bay. 



Leda jamaicensis D'Orb. Dredged in Tampa Bay. Occasional odd 

 valves found elsewhere. 



* Area pexata Say. East coast, near Fernandina, F. C. Sawyer. 



*Arca ineongrua Say. East coast, near Fernandina, Sawyer; South- 

 East Keys, Bahrt. 



Area domingensis Lam. Tortugas Reefs, under stones, at low tide. 

 Probably equal to A. gradata Brod., and donaciformis Reeve. 



Area transversa Say. Marquesas Keys; South-East Keys, Bahrt. 



Area deshayesii Stm. Key West. 



Area floridana Con. West coast, common, especially at Sanibel 

 Island. Great quantities of young living shells were dredged in the 

 Gulf of Mexico, near Gasparilla Pass. 



Area fusea Brug. Tortugas Reefs. 



Area imbricata Lam. Tortugas Reefs; Garden Key, among corals. 



Area gradata Brod. Tortugas. 



Area Candida Chem. Several fine shells of this variety were taken 

 on the Tortugas Reefs, at low water. 



Area nocz L. West coast; not rare. 



Area noce, var. americana D'Orb. Tortugas; sometimes partially 

 burrowing in rocks, at low tide. I have also found A. imbricata bur- 

 rowing in rock and coral. 



Area barbadensis Pet., var. Tortugas. 



Area modiola Poli. ? Rare. A few valves of this were found at "The 

 Rocks," near Little Sarasota Pass. 



Area ponderosa Say. West coast; common. It is probable that 

 when the West Indian Areas are more thoroughly studied and the syn- 

 onomy is unravelled, the number of species in the above list may be 

 somewhat reduced. 



Peetunculus castaneus Lam. Tortugas. 



Peetunculus pectinatus Lam. Dredged at the mouth of the Manatee, 

 in great abundance; young. Adult shells occasionally found at Egmont; 

 fossil on Terraciea Island. 



Mytilus exustus D'Orb. Key West; Havana, Cuba. A beautiful 

 shell. 



Mytilus cubitus Say. Tampa and Sarasota Bays. Abundant among 

 oysters, and in Vermctits nigricans. 



