202 Bulletin 29 366 



Zones A and B (Common), Rio Gurabo at Los Quemados; 

 Bluff 1, Cercado de Mao (Rare). 



Genus Codakia Scopoli 



Codakia orbicularis Linne 



Plate .35, Figure i 



Venus orbicularis Linne, Syst. Nat., ed. 10, p. 688, 1758. 



Lucina tigerina Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 251, 1873. 



Not of Linne. 

 Lucina tigrina Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p. 



530, 1876. Not of Linne. 



We found a single fossil shell which appears in every respect 

 like the young of C. orbicularis, on the Monte Cristi beach. 

 Doubtless our fossil is similar to those referred by Gabb and 

 Guppy to C. tigerina; but the true tigerina is East Indian, the 

 West Indian analogue being C. orbicularis. The latter has not 

 been heretofore definitely recorded from beds older than Pliocene; 

 yet Dr. Dall mentions fragments resembling this shell from the 

 white limestone of Clairmont, St. Ann's, Jamaica, — a horizon re- 

 garded by Hill as somewhat older than the Bowden. 



Locality. — (Exp'd '16) Zone H, Rio Cana at Caimito. 



Genus Ljjcina Bruguiere 



Luci?ia chrysostoma (Meuschen) Philippt 



Plate 35, Figure 2 



Tellina crysostoma Meuschen, Mus. Gevers., p. 482, 1787. 



Lucina chrysostoma Philippi, Abb. und Beschr. Conchy., 2, p. 206, pi. 



1, fig. 3, 1847. 

 Venus edentula Chemnitz, Conch. Cab., 7, pi. 40, figs. 427-429, 1784. 



Not of Linne, 1758. 

 Lucina edentula Reeve, Conch. Icon., Lucina, pi.- 2, fig. 9, 1850. 

 Loripes edentula Gabb, Trans. Amer. Phil. Soc, vol. 15, p. 251, 1873. 



Our shells appear to be the recent species. The largest 

 measures 70 mm. in length by 60 in altitude. 



Localities.— { Exp'd '16) Bluff 3, Cercado de Mao; Zone H, 

 Rio Cana. 



