FAUNA OF ORTHAULAX PUGNAX ZONE. 129 



LITHOPHAGA ANTILLARUM Orbigny. 



Lithodomus antillarnm Orbigny, Moll. Cubana, vol. 2, p. 332, pi. 28, figs. 



12, 13, 1847 (French edition; Spanish edition, with atlas, 1845). 

 Modiola corrugata Philippi, Abbild. und Beschr., vol. 2, p. 147. pi. 1, fig. 1, 



1846. 

 Lithodomus corrugatus Reeve, Conch. Iconica, vol. 10, pi. 1, fig. 1, 1858. 

 LWiophagus dactylus Morch, Cat. Yoldi, vol. 2, p. 55, 1853; not of Sow- 



erby, 1824. 

 Lithophagus caribwus Dall, Bull. U. S. Nat. Mas., No. 37, p. 38, No. 81, 



1889 ; not of Philippi. 

 Lithophaga antillarum Dall, Trans. Wagner Inst., vol. 3. pt. 4, p. 799, 



1898. 



Tampa silex beds, Ballast Point, Tampa Bay, Florida; Willcox 

 and Dall. Living from Florida southward, throughout the iVntilles, 

 usually as a borer in corals. U. S. Nat. Mus. No. 154861. 



The casts of the borings due to this and the other species are 

 rather common in the silex beds, often being hollow and the cavity 

 partly filled with water, in which state they are sold as curios to 

 tourists. 



LITHOPHAGA NIGRA Orbigny. 



Lithodomus niger Orbigny, Moll. Cubana, vol. 2, p. 331, pi. 28, figs. 10, 



11, 1847 (French edition; Spanish edition, 1845). 

 Modiola caribaea Phillippi, Abbild. und Beschr., vol. 3, p. 20, pi. 2, fig. 5, 



1847 ; Zeitschr. f. Malak. for 1847, p. 116. 

 Modiola antillarum Philippi (not Orbigny), Abbild. und Beschr., vol. 3, 



p. 20, pi. 2, fig. 4, 1847 ; Zeitschr. f. Malak. for 1847, p. 116 (young shell). 

 Mytilus lithophagus GibbIes, S. Car. Cat., p. 22, 1848, not of Linnaeus. 

 Lithophagus nigra Morch, Cat. Yoldi, vol. 2, p. 56, 1853. 

 Lithodomus antillarum Reeve, Conch. Iconica, vol. 10, pi. 2, fig. 7, 1858. 

 Lithophaga nigra Dall, Trans. Wagner Inst., vol. 3, pt. 4, p. 799, 1898. 



Tampa silex beds at Ballast Point, Tampa Bay, Florida. Living 

 from South Carolina southward through the West Indies and to 

 Eio Janeiro, Brazil. U. S. Nat. Mus. No. 154360. 



LITHOPHAGA NUDA DalL 

 Plate 24, fig. 4; plate 26, fig. 7. 



Lithophaga nuda Dall, Trans. Wagner Inst., vol. 3, pt. 4, p. 800, pi. 11, 

 fig. 7, pi. 35. fig. 27, 1898. 



Tampa silex beds at Ballast Point, where it and the casts of the 

 burrows are very common, but rarely well preserved. U. S. Nat. 

 Mus. Nos. 165187, 165189. 



Few of the specimens retain the thin outer coating of the valves, 

 but those that do are easily recognized by their smooth surface and 

 distinguished from the species of Diberus by the cylindrical form 

 and absence of the calcareous mantle outside of the shell. The bur- 

 row cast is represented by figure 4. 

 54907°— Bull. 90—15 9 



