62 



GEOLOGY AND PALEONTOLOGY OF THE WEST INDIES. 



their height decreases toward the sides. A comparatively small number of 

 pillars in the central part originating in the wall of the embryonic chamber and 

 extending to the periphery. 



Horizontal section shows that the equatorial chambers are regularly 

 hexagonal and fairly thick-walled, and that those of successive annuli are of 

 very different sizes. 



Diameter up to 9 mm.; height up to 3 mm. or more. 





FIG. 8. Sections of embryonic chambers of Lepidocyclina crassata, new species, showing variation 

 in position of two or more divisions, and the comparatively thick outer wall. X 25. 

 Specimens from limestone from drift near top of landslide next north of Los Melones, 

 Cuba. 



Type specimen, section (U. S. N. M. No. 328192) from station 7513, 

 orbitoidal limestone, outcrop where Palmer Trail joins Ocujal Trail, 

 Cuba. Specimens are also numerous in material from 7512, Ocujal; 

 7519, orbitoidal limestone, from drift near top of landslide next north 

 of Los Melones; 7521, limestone, top of Mogote Peak, Cuba. All the 

 specimens were collected by 0. E. Meinzer. 



L. crassata is very heavy and thick-walled and in section may be 

 easily distinguished from any other Cuban or West Indian species of 

 Lepidocyclina. 



Lepidocyclina subraulinii, new species. 

 (Plate 11, Figures 6, 7; Plate 12, Figures 5, 6.) 



The following is a description of this species : 



Test circular, much thickened in the central portion, which occupies about 

 one-third the diameter of the test; peripheral portion much flattened, thin; 

 thick central portion irregularly papillate, peripheral portion smooth, showing 

 almost no tendency to become saddle-shaped. 



Vertical section shows the general thickness, the central lenticular body, 

 and the thin periphery ; central portion with very numerous pillars, increasing 

 in diameter toward the surface; lateral chambers crowded between the pillars, 

 very numerous in the vertical columns and much wider than high; equatorial 

 chambers increasing in diameter toward the periphery, the outer margin 

 convex and with a series of fine pores. 



Horizontal section shows the equatorial chambers, which are polygonal; the 

 outer margin strongly convex; pillars subpolygonal, with the lateral chambers 

 making irregular polygonal meshes between them, toward the periphery the 

 lateral chambers making up the entire test as the pillars decrease in number. 



Diameter up to 24 mm. ; thickness in center 4.5 mm. 



Type specimen (U. S. N. M. No. 328193) from station 3478, Nue- 

 vitas, Cuba, collected by A. C. Spencer. Other specimens apparently 

 this species occur at 7666, Sierra Guaso, northeast of Guantanamo, 

 collected by N. H. Barton. 



