TRANSACTIONS OF WAGNER 



TERTIARY FAUNA OF FLORIDA 



surface smooth over a small anterior area, and over the posterior area which is 

 compressed so that the pinch gives to the lovvrer posterior margin a distinct 

 insinuation; between these the disk is covered by minute radii which, though 

 conspicuous in eroded shells, hardly interrupt the smoothness of the surface 

 when perfect ; the outline is rounded in front and below and slightly oblique ; 

 interior polished, with the adductor scars impressed ; the margin, except of 

 the anterior and posterior areas, finely serrate. Lon. 24, alt. 26, diam. 14 mm. 

 All the species of Lavicardium are very similar shells, especially when they 

 have lost color by fossilization, but this species is readily recognizable by the 

 small size of the smooth areas and the peculiar pinching of the posterior area. 



Cardium (Lieevicardium) serratum Linn^. 



Cai'dium serratum L., Syst. Nat., ed. x., p. 680, 1758; ed. xii., p. 1123, 1767; Chemnitz, 



Conch. Cab., vi., p. 193, pi. 18, fig. 189, 1782. 

 Cardiuvi Iwvigatum Lamarck, An. s. Vert., vi., part i., p. 11, 1819 (not of Born, Mus. 



Vind. Test., p. 47, 1780; nor of Linne, Syst. Nat., x., p. 680, 1758). 

 Cardium citrimim Wood, Gen. Conch., p. 223, pi. 54, fig. 3, 1815. 



Liocardium pictum Ravenel, Proc. Acad, Nat. Sci. Phila. for 1861, p. 44, 1862 (pullus). 

 Cardium hiatus " Meuschen" fide Krebs, W. I. Cat. Sh., p. 115, 1864. 

 Cardium lineatum Krebs, op. cit., not of Gmelin, 1792. 

 Cardium pristis Valenciennes, iide Krebs, op. cit. 



Cardium oviputamen Reeve, Conch. Icon., Cardium, pi. vii., fig. 36, 1844. 

 Cardium venustum Gabb, Geol. St. Domingo, p. 251, 1873. 

 Cardium serratum Dall, Proc. U. S. Nat. Mus., xix., No. mo, p. 327, 1896 (not serratum 



of Pennant, 1778). 



Oligocene of Bowden, Jamaica; Miocene of Alum Bluff, Florida; Plio- 

 cene of the Caloosahatchie and Myakka Rivers, Florida, and Tilly's Lake in 

 the Waccamaw District, South Carolina ; Pleistocene of south Florida and 

 the Antilles ; recent from Cape Hatteras, South Carolina, to Bahia, Brazil, in 

 water from a few feet to one hundred fathoms in depth. 



After a good deal of study and thought upon the subject with a large 

 series of specimens I have been led to the conclusion that the differences be- 

 tween the shells commotily known as serratum, IcEvigatuin, and oviptttamen are 

 not of specific value. I am unable to specify any distinctive characters between 

 the Bowden fossil and recent specimens of " serratum" of the same size. All 

 the fossils observed are of the serratum type. I have seen none of the squarish 

 form usually called Icuvigatniii Lainarck, which is not the original lavigatum 

 of Linne. Small specimens from Bowden, to which a correspondent attached 



