PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 311 
scribed, I wouid suggest for it, in case it be deemed worthy of separa- 
‘ \ 
tion, the name of Transennella. 
Anomalocardadia flexuosa Lin. 
“Salt Pond” at Key West, numerous but immature. 
Cardium mortoni Say. . 
In sand between tides near the mouth of the Manatee River. The 
colors are more vivid than in northern specimens, and the shell is usu- 
ally much inflated. 
Cardita floridana Conrad. 
Plenty on the mud flats at Sarasota Bay. 
Leda? eborea Conrad. 
Cedar Keys at low water. Like LZ. jamaicensis but slenderer, more 
pointed, and with coarser concentric ribs. 
Arca (Barbatia) dominguensis Lam.* 
Rare, under stones at Key West. 
Arca (Barbatia) gradata Broderip. 
With the last. 
Perna ephippium Lam. 
Rather rare. Rocks between tides at Key West. 
Modiola papyria Conrad. 
Plenty; on the mud flats at Cedar Keys. Tampa Bay (Conrad). 
This exquisite species deserves a more thorough examination. It 
appears to exist around the borders of the Gulf and of the Caribbean 
sea; at least I have seen very much larger specimens from near Aspin- 
wall on the Isthmus. It resembles J/ycetopus in several particulars, and 
itis doubtful if the soft parts are similar to those of typical Modiole. 
It is extremely similar to (and perhaps identical with) Modiola petagnee 
Seacchi as figured by Reeve. 
Mytilus exustus Lam. 
Plenty on the beach at Key West. Exists throughout a great part 
of the Antilles. 
Lima? tenera Chemn. 
Cedar Keys, rare; also in the West Indies. 
The tollowing species are noted or described as new in the papers of 
Messrs. Calkins and Melvill: 
Triton veliei Calkins 1. ¢., p. 235, pl. viii, figs. 1, 2. 
Key West, Ve'ie, and Marco, Collier. 
Cdostomia alba Calkins lL. ¢., p. 239, pl. viii, fig. 3. 
Cedar Keys; 2-6 fathoms; Calkins. 
