BuiXKTIN 29 348 



Localities. — (Exp'd'16) — Guayubin to Mao road, and the 

 Teredo zone, Rio Cana at Caimito. 



Ostrea virginica Gmelin 



Ostrea virginica Gmelin, Syst. Nat., p. 3336, 1792. 



Ostrea virginica Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 257, 1873. 



Ostrea virginica Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p. 



532, 1876. 

 Ostrea virginica Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 4, p. 687, 

 1898. 



Fide Dall, citations of this species from beds older than Plio- 

 cene are questionable. But our fossils so resemble specimens of 

 virginica that I follow Gabb and Guppy in referring them to 

 that species, at least tentatively. 



Localities. — (Exp'd '16) Guayubin to Mao road, Rio Cana; 

 Samba Hills at an appromimate altitude of 540 feet; top of Zone 

 D, Rio Gurabo at Los Quemados; Bluff 3, Cercado de Mao. 



Genus Pecten Miiller 



Pecten soror f Gabb 



Janira soror Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 257, 1873. 

 Pecten {Pecten) soror Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 4, 

 p. 712 1898. 



Shell very inequivaive, right valve very convex, left con- 

 cave; ribs twenty to twenty-two, square, crossed by fine squa- 

 mose lines of growth. Length 48 mm. Gabb notes that this 

 unfigured species is allied toy. Jacobceus, maxima and media but 

 differs from them all in the greater number and minutely squa- 

 mose character of its ribs. 



Guppy reported the shell from Bowden and Cumana. The 

 type locality is Santo Domingo. We have a fragment that may 

 be this species but is too incomplete for positive identification. 



Locality. — (Exp'd '16) Bluff 1, Cercado de Mao. 



Pecten eugrammahis Dall 

 Plate 34, Figure 4, 5 

 Pecten {Pecten) eugrammatus Dall, Trans. Wagner Inst. Sci., vol.3, 

 pt, 4, p. 712, pi. 34, fig. 22, 1898. 



