SIMPSON — CONTRIBUTIONS TO THE MOLLUSCA OF FLORIDA. 7 I 



Solecurtus gibbosus Speng. Manatee River, on sandy, muddy flats. 



Solecurtus divisus Speng. West coast ; common. 



Solen viridis Say. Manatee River; Tampa and Sarasota Bays. 



Saxicava (Paramyd) subovata Con. Dredged in Tampa Bay. 



Corbula swiftiana Ad. Red-fish Point; Tortugas. 



Corbula nasuta Say. Dredged abundantly in Sarasota and Tampa 

 Bays. 



Pandora trilineata Say. Something like one hundred and fifty living 

 specimens and a number of dead ones were dredged in Tampa Bay. 

 One or two valves were previously found washed ashore on Passage 

 Key. Mr. Dall supposed this to be a new species, but found, on re- 

 ferring to Say's original figure and description, that it was the shell he 

 had named P. trilineata, and that the heavy New England shell usually 

 called by that name is undescribed. 



Pandora (Kennerlia) bushiana Dall. 



Pandora (Kennerlia) bushiana Dall. Rep. Blake Moll. Bull. Mus. 

 Comp. Zool., XII.. p. 312, September. 1886: 



"Shell small, with the beaks very anterior; the anterior cardinal 

 margin marked with a sharp keel, cutting off an almost lineal area; the 

 margin descends from the beaks in a straight line, the basal curve com- 

 mencing suddenly at a rather obtuse angle, then following an even 

 curve, and slightly inflexed only near the posterior tip below the short, 

 square-ended rostrum; the shell very thin, the left valve somewhat con- 

 vex, the right one concave, both sculptured with silky concentric striae; 

 the margins of the two valves coincident; beaks small, hardly rising 

 above the long convex arch of the posterior cardinal margin; the right 

 valve with a strong keel on its upper posterior margin, and no other 

 radiating sculpture, left valve with an impressed line from the beaks to 

 the base, a little behind them, but which does not indent the basal mar- 

 gin ; there is also a sharp thread from the beak to the lower angle of 

 the rostrum ; above this thread, as usual, the lines of growth are coarse. 



"Lon. of shell, 1 1.5 mm.; of anterior portion, 2.0 mm.; height, 5.5 

 mm. ; and diameter about 1.0 mm. 



"This species, which differs from all others of the group known to 

 me, in having the rostrum bent down instead of upward, and the pos- 

 terior cardinal margin convex instead of concave, was dredged alive in 

 six fathoms mud, Tampa Bay, Florida, by Mr. Charles T. Simpson." 



The above is Mr. Dall's description of this new species, of which 

 some half-dozen or more specimens were obtained. It was sent to him 

 for determination, together with other small species. 



Thracia rugosa Con. Dong Key, one shell ; mainland of Hondu- 

 ras, east coast, one shell. Mr. Dall thinks this may be Thracia dic- 

 torta Mont. 



Periploma angulifera Sby. Tortugas, one shell; Egmont Key, 

 several shells. 



Lyonsia floridana Con. Common in Tampa Bay. 



