INSTITUTE OF SCIENCE, PHILADELPHIA. 133 



Cypraea (Siphocypraea) problematica, nov. sp. Fig. 73. 



Specimens of this species (y. ant., p. 87, Fig. 12), with a complete 

 coating of enamel, show that the general color of the shell was buff or 

 cream-yellow above, irregularly and minutely spotted with darker shades 

 of the same color (inclining to orange), and impure white below. 



Mitra liueolata, nov. sp. Fig. 74. 



Specimens of this shell, in certain respects more perfect than the type 

 described on p. 79, indicate that the surface was covered by revolving 

 lines of purple, corresponding in position to the raised lines, and that . 

 these were regularly blotched with spots of the same color, resembling 

 the similar markings of Valuta Junonia. I have already indicated the 

 characters which doubtfully serve to distinguish this species from Conrad's 

 Mitra Carolinensis, and am now more than before inclined to believe that 

 it may prove only a variety of that form. 



Conus Tryoni, nov. sp. Fig. 75. 



Length, six inches. 



The following additional species have been identified as occurring in 

 the " Floridian " (f liocene) deposits of the Caloosahatchie : 



Fusus exilis. Niso, nov. sp. 



Fasciolaria acuta. Turbonilla, sp. 



*Marginella roscida. Corbula, sp? 



*Terebra dislocata. *Tellina tenera. 



*Columbella lunata. *Amphidesma equalis. 



Cancellaria depressa ? *Semele rosea. 



*Conus papilionaceus *Cardium serratum. 



(with color markings). *Lucina cribraria. 



*Conus Floridanus ? radians (Antillarum). 



*Trivia pediculus. *Leda acuta. 



*Xenophora conchyliorum ? Astarte undulata ? 



Turbo, nov. sp. Glandina. 



Crucibulum ramosum. Planorbis. 



* " scutellatum. Amplcxa. 



*Trochita centralis ? Paludina. 

 *Obeliscus arenosus. 



The species preceded by an asterisk are living forms. 



With the above were found associated the remains of a proboscidean, 

 horse, alligator and turtle. 



Note on the geology of Little Sarasota Bay. Mr. Willcox furnishes me 

 with the following observations, made during a more recent visit, bear- 

 ing upon the geology of this region : " Two small fresh-water streams 

 empty into Little Sarasota Bay, not far south of Mr. Webb's house. At 



