146 GEOLOGY AND PALEONTOLOGY OF THE WEST INDIES. 



The Cuban specimens are well grown, being considerably larger than 

 most of the fossils from Florida, but agreeing well with mature living 

 shells. They are preserved only as casts. 



Localities. Near Santiago, Cuba, stations 3192, 5255, Wilcox, 

 Black; Tampa, Chipola, Caloosahatchee River, Florida; Trinidad. 



Geologic horizon. Oligocene. 



Figured specimens. U. S. Nat. Mus. No. 167153. 



Lithophaga nigra (d'Orbigny). 

 (Plate 14, Figure 6.) 



Lithodomus niger d'Orbigny, de la Sagra's Hist, de Cuba (Spanish edition), pt. 2, vol. 5, plat 



28, figs. 10, 11, 1845. 



Lithodomus niger d'Orbigny, idem (French edition), vol. 2, p. 331, plate 28, figs. 10, 11, 1847. 

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

 Lithophaga nigra Dall, U. S. Nat. Mus. Bull. 90, p. 129, 1915. 

 Lithophaga nigra Maury, Bull, Amer. Pal., vol. 5, p. 358, 1917. 



The following is the original description of this species: 



"LITHODOMUS testa oblongo-elongata, recta, epidermide nigrescente; latere 

 buccale angustiore, obtuso; latere anali elongatissimo subterque rotundato, 

 regione ligamenti subcompresso, regione palleali transversim striato; natibus 

 mediocribus, contortis intus; latere anali incrassato, albido." 



This species may readily be recognized by the fact that its stria? 

 cease abruptly at an imaginary line drawn from the beak to a point 

 near the posterior extremity of the ventral margin, leaving the dorsal 

 portion of the shell smooth. 



Localities. Friar's Hill, Antigua; La Cruz and Santiago, Cuba, 

 stations 6856, 3441, 5255, Vaughan, Black; Tampa "silex" bed; living in 

 the Antillean region and adjacent areas. 



Geologic horizon. Oligocene. 



Type.W 



Figured specimen. U. S. Nat. Mus. No. 167156. 



Lithophaga species. 



The Vaughan collection contains one specimen of this genus which 

 retains traces of ribbing on the dorsal portion of the valve. As the 

 outer layers of the shell are absent from the remainder of the valve, 

 the specific determination must await additional collections. The 

 species may prove to be L. antillarum (d'Orbigny). 



Locality. One-half mile north of McKinnon's Mill, Antigua, sta- 

 tion 6888, Vaughan. 



Geologic horizon. Oligocene. 



Teredo species. 



A large species of Teredo was abundant in the Oligocene of Cuba. 

 The valves have never been found, but tubes of all sizes up to 38 mm. 

 in external diameter are common. The tubes are divided towards the 

 smaller ends by a partition into two unequal chambers in the manner 

 shown in the figure of Kuphus incrassatus Gabb. 1 



1 Jour. Acad. Nat. Sci. Phila., vol. 8, p. 342, plate 44, figs. 12 a-e. 



