TRANSACTIONS OF WAGNER 

 800 



TKKTIARY FAUNA OF FLORIDA 



Moiiio/a caribu'a Phil., Abbilcl. und IJeschr., iii., p. 20, pi. 2, fig. 5, 1847; Xcitschr. fur 



Mai. for 1847, ]). I 16. 

 Mmliola antillaniin Phil., op. lit., \i. 20, pi. 2, fig. 4, 1847; Zcitschr., p. 116 (not of 



Orbigny ; young shell). 



Mytilus Uthopliagtis Gibbes, S. Car. Cat., p. \\\\., 1848; not of Linnr. 

 Litliflphagits nigra Morch, Cat. Yoldi, ii., i>. 56, 1853. 

 Lilluhloiinis cintillanini Reeve, Conch. Icon., x., pi. 2, fig. 7, 1857. 



Oligocene silcx beds of Ballast Point, Tampa Bay, Florida, Ball ; recent 

 at Bermuda, and from South Carolina southward through the West Indies 

 to Rio Janeiro, Brazil. 



Lithophaga nuda n. s. 

 PLATE n, FIGURE 7; PLATE 35, FIGURK 27. 



Oligocene silex beds at Ballast Point, Tampa Bay, Florida, where it. is 

 the most common species, and its burrows, or their casts, very numerous. 



Shell large, thin, closely resembling L. nigra, but from which it may be 

 instantly discriminated by the absence of all transverse or radial striation. 

 Alt. 17 (?), lat. 50, diain. 15.7 mm. 



Few of the specimens retain the outer markings of the shell, but those 

 that do are easily recognized by the smooth surface, only sculptured by incre- 

 mental lines. From the Diberns group, which also have unstriated shells, it is 

 distinguished by its cylindrical form, large size, absence of sulcations and of 

 the calcareous mantle. 



Lithophaga (Myoforceps) aristata Dilluyn. 



Mytilus aristatits (Solandcr MS.) Dillwyn, Cat. Rec. Sh., i., p. 303, 1817. 

 Motliolti cai/digcm Lam., An. s. Vert., vi., p. 116, 1819 ; (after Enc. Mcth., pi. 201, tig. 



'8) Phil., Abb., ii., p. 149, pi. i, fig. 5, 1846. 

 Mytilus caiKUgcnis Gibbes, Cat. S. Car., p. xxii., 1848. 

 Lithodonms arista/us Forbes and Hanley, Brit. Moll., ii., p. 212, 1851. 

 Lithodomus caudigerus Sby., Genera, Lith., fig. 4, 1824; Reeve, Conch. Icon., x., pi. 



iii., fig. 16, 1857. 



Lithophagus aristatus Stimpson, Checkl. Rec. Sh., p. 2, 1860. 

 Lithophagiis forficattis Ravenel, Proc. Acad. Nat. Sci. Phila. for 1861, p. 44; Tryon, Am. 



Mar. Conch., p. 188, 1873 ; Dall, Hull. U. S. Nat. Mus., No. 37, p. 38, 1889. 



Oligocene of the silex beds at Ballast Point, Tampa Bay, Florida ; recent 

 from Cape Fear, North Carolina, south to the West Indies, east to the Red 

 Sea, west to Mazatlan on the Pacific coast of Mexico. 



Only fragments probably referable to this form were obtained at Ballast 



