FOSSIL FORAMINIFERA FROM THE WEST INDIES. 71 



Orbitolites complanata (Lamarck) variety. 



Orbitolites complanata (Lamarck) H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, p. 218, 

 plate 16, fig. 1, 1884. 



The form of 0. complanata, very abundant in a fine sandy material 

 from Bluff 3, Cercado de Mao, Santo Domingo, differs from the ordi- 

 nary form of this species in being thinner, more like 0. duplex, but 

 with the multiple chambers of 0. complanata; the apertures, however, 

 occur in a very narrow band along the center of the peripheral face. 

 These characters are very constant. 



Alveolina species (?). 

 (Plate 5, Figure 14.) 



A single specimen, apparently a longitudinal section of Alveolina 

 occurs in sectioned material from U.S. G.S. No. 6949, Simson Bay 

 Point, St. Martin, Leeward Islands. It occurs with abundant Orbitolites. 



