TRANSACTIONS OF WAGNER 

 I ;o6 



TERTIARY FAUNA OF FLORIDA 



margin crenulate ; pallial sinus obsolete, not passing in front of the posterior 

 adductor scar. Length 28, height 20, diameter 14 mm. 



While this species has its range of variation like others, its most prominent 

 characteristic is the presence and persistence of the concentric sculpture, which 

 in the great majority of specimens is continuous across the disk. 



Anomalocardia brasiliana Gmelin. 

 Venus brasiliana Gmelin, Syst. Nat., vi., p. 3289, 1792 (syn. exclus.). 

 Venus Aexuosa Born, Test. Mus. Vind., p. 62, pi. iv., fig. 10, 1780 ; not of Linne, Syst. Nat., 



ed. xii., p. 1 13 1, 1767. 

 Cytherea macrodon Lamarck, An. s. Vert., v., p. 580, 1818. 

 Venus macrodon Deshayes, An. s. Vert., vi., p. 327, 1834; Hanley, Bio. Shells, p. 116, 



pi. ix., fig. 7, 1843; Sowerby, Thes. Conch., ii., p. 717, pi. clvi., fig. 88, 1853. 

 Cytherea lunularis Lamarck, An. s. Vert., vi., p. 580, 1818. 

 Venus lunularis Deshayes, An. s. Vert., vi., p. 227, 1834; Philippi, Abb. u. Beschr., i., p. 



177, pi. iii., fig. 10, 1844. 



Pliocene of the Caloosahatchie beds, at Shell Creek, south Florida, Willcox, 

 rare ; Pleistocene of the Antilles and of Brazil, south to Rio Grande do Sul ; 

 living from Wilmington, North Carolina, south to the West Indies and Rio 

 Janeiro. 



This is the common Anomalocardia of the West Indies and Brazil, usually 

 labelled A. Hexuosa after Born, but not the Venus ftexuosa of Linne, which 

 is an allied species and has been figured by Hanley in his monograph of the 

 Linnean types. 



The present species differs from A. caloosana in its short, inflated form, 

 with the concentric sulci emphasized in front and on the posterior dorsal ridges, 

 but absent in the middle of the shell. When fully adult it is a much heavier 

 shell than A. caloosana, and the larger cardinals are much stouter, but in the 

 young these differences are not so marked. 



Genus VENUS (Linn<5) Lamarck. 



<^Venus Linne, Syst. Nat., ed. x., p. 685, 1758; ed. xii., p. 1128, 1767; Gmelin, Syst. Nat., 

 p. 3266, 1792. First species V. Dione L. ; Murray, Fund. Test., p. 148, pi. iii., figs. 11, 

 16, 17, 1771 (cites V. dione L. only) ; Scopoli, Intr. ad. hist, nat., p. 399, 1777 (cites 

 no type) ; Bolten, Mus. Bolt, p. 125, 1798 (contains 44 species in two unnamed 

 groups, including V. mercenaria and V. dione L., but mentions no type. 



Pectunculus Da Costa, Brit. Conch., p. 184, 1778, ex parte, not of Lamarck, 1799. 



= Venus Lamarck, Prodrome, p. 84, 1799; sole example V. mercenaria L. ; Fischer, Man. 

 de Conchyl., p. 1083, 1887. 



