FREE INSTITUTE OF SCIENCE 



TERTIARY FAUNA OF FLORIDA 



>Pullastra Bucquoy, Dautzenberg and Dollfus, Moll, de Roussillon, ii., p. 402, 1893 (T. 



pullastra L.). 

 ^Amygdala Bucquoy, Dautzenberg and Dollfus, Moll, de Roussillon, ii., p. 430, 1893 



(Venus decussata L.). 

 ^.Eutapcs Chiamenti, Revista Ital. Sci. Nat., xx., p. ii, Feb., 1900 (T. papilionaceus 



Lam.). 



^>Polititapes Chiamenti, op. cit., p. ii, Feb., 1900 (V . aurea Gmel.). 

 ^Ruditapes Chiamenti, op. cit., p. 13, Feb., 1900 (V '. decussata L.). 

 ~^>Callistotapes Sacco, Moll. Terz. Piem. Lig., xxviii., p. 52 (Venus vetula Basterot), 



April, 1900. 



"^.Myrsopsis Sacco, op. cit., p. 57, April, 1900 (Venerupis pernarum Bonelli). 

 "^Taurotapes Sacco, op. cit., p. 58, April, 1900 (Venus Craven Michelotti). 

 Leukoma (sp.) Romer, Mai. Blatt, xiv., p. 103, 1867. 



Paphia Bolten contained seven species belonging to the genus Tapes 

 Megerle, senso lato, one Meretrix and one Sunetta, besides a single unidenti- 

 fiable species. All these had the same general form and aspect and the genus, 

 for the date when it was proposed, was remarkably compact and homogeneous. 

 The species of Tapes were T. ala-papilionis Bolten (after Chemnitz) or papilio- 

 naceus Lamarck, T. guttulatus Bolten = adspersus (Chemnitz) Sowerby, T. 

 fasciatus Da Costa, T. liter atus Linne, T. punctatus Chemnitz (= literatus 

 var.), and T. decussates Linne. 



Meretrix was separated by Lamarck in 1799, and Sunetta by Link in 1807, 

 so the remaining species form the foundation of the revised genus and the 

 name Tapes, proposed only in 1811, becomes a synonym unless it be retained 

 in a sectional sense for the species allied to Venus literata Linne. In that case 

 the elegant, brightly colored, polished, and concentrically sculptured tropical 

 forms like P. ala-papilionis Bolten will represent the typical Paphia. 



The dentition of Paphia has the formula L - 10IOI -, the anterior right and 



R. oioioi. 



posterior left cardinals always entire, the others often grooved or bifid. 

 The genus Paphia may be divided as follows : 



Subgenus Paphia Bolten. Type P. ala-papilionis Bolten (= Venus rotundata 

 pars, Gmelin,-non Linne). 



Valves elongate oval, subcompressed, with close concentric riblets covered 

 by a vernicose periostracum and without radial sculpture ; coloration brilliant, 

 lunule and escutcheon narrow, smooth, impressed, the lunule unequally 

 divided, the right portion encroaching on the left ; inner margins smooth, 

 the pallial sinus free, ample, rounded in front, and obliquely ascending. The 

 species are of warm temperate and tropical seas in the eastern hemisphere, 



