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TERTIARY FAUNA OF FLORIDA 



Point, but its wide distribution, evidently antedating tiie present conformation 

 of Central American and Mediterranean lands, is much in favor of its antiquity. 



Lithophaga (Diberus) bisulcata Orbigny. 

 Litliodoinus bisulcatus Orb., Moll. Cubana, ii., p. 333, pi. 2S, figs. 14-16, 1847 (Spanish 



edition and atlas, 1845). 

 Modiola appcndiculata, Phil., Abbild. und Beschr., ii., p. 150, pi. i, fig. 4, 1846. 

 Myiilus attenuatus Gibbcs, Cat. S. Car., p. .xxii., 1S48 ; not of Deshayes. 

 Lithophagus appendiculatusWoxA., Cat. Yoldi, ii., p. 56, 1853. 

 LifJiodomiis appendiculafus Reeve, Conch. Icon., x., pi. 4, fig. 21, 1857. 

 LitJwdoiims biexcavatus Reeve, op. cif., fig. 22, a-b. 

 Litlwphagus bisulcatus Dall, Bull. U. S. Nat. Miis., No. 37, p. 38, 1889. 



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

 recent from South Carolina southward to the Gulf of Mexico, West Indies, 

 and Rio Janeiro, Brazil. 



This species was found in the silex beds not only with the shell pre- 

 served or reproduced, but with a complete pseudomorph of the calcareous 

 mantle in which the lime was replaced by silica. 



Among the species reported in the literature of the American Tertiary is 

 L. daiboniensis Conrad (Journ. Acad. Nat. Sci. Phila., 2d Sen, i., p. 131, pi. 14, 

 fig. 27, 1848; Aldr., Bull. Pal., 2, p. 17, pi. 5, fig. 14, 1895), from the Clai- 

 bornian; L. gainescnsis Harris (Bull. Pal, 4, p. 50, pi. 3, fig. 7 «, i8g6), from 

 the Upper Midway Eocene of Georgia, which may be referable to Botida ; L. 

 incurva Gabb (Journ. Acad. Nat. Sci., 2d Ser., viii., p. 377, pi. 47, fig. 80, 1881), 

 from the Pliocene of Costa Rica, which is certainly a Botula and very close to 

 B. ciunamomea Lam. ; and L. subalveata Conrad (Am. Journ. of Conch., ii., p. 

 73, pi. 4, fig. 4, 1866), from the lowest Miocene of New Jersey, a peculiar 

 species with which Modiola liojistonia Harris (1895) should be carefully com- 

 pared. L. dactylus Sby. is reported by Conrad (Am. Journ. Sci., 2d Ser., i, p. 

 210) as having been found by Lyell in Georgia, but this is perhaps a mis- 

 identification ; the species may have been L. mida. The figure of Byssomia 

 petiicoloides Lea (Contr. GeoL, p. 48, pi. i, fig. 16, 1833) much resembles a 

 chipped Litliopliaga, and the suggestion of Gregorio that it is identical with 

 L. daibornensis Conrad is plausible. 



Genus CRENELLA Brown. 

 Crcnella Brown, 111. Conch. Gt. Brit., pi. 31, figs. 12-14, 1S27 ; 2d edition, p. 75, pi. 23, 

 figs. 12-14, 1844. Type Mytilus decussalus Montagu, 1808. 



