64 GEOLOGY AND PALEONTOLOGY OF THE WEST INDIES. 



stone below upper limestone bed, Anse Ecaille side of point between 

 Anse Ecaille and Anse Lizard; T. W. Vaughan, collector; specimens 

 apparently weathered out from the matrix are abundant. Also from 

 68976, point between Colombier Point and bay next to St. Jean Bay. 

 Hand specimens showing sections of this heavy-pillared species are 

 abundant in a hard cherty material, No. 6902, southeast section of 

 southwest side of island near Negre Point, altitude 360 feet; and 6903, 

 N. 67 E. from summit of Negre Point, across low saddle-back of point, 

 elevation 220 feet. All the above are from St. Bartholomew. 



This species is related in many ways to Lepidocyclina macdonaldi 

 Cushman from Panama, in the white limestone at David. The general 

 vertical section is much more heavily pillared in L. antillea, although 

 the figured specimen, not being exactly central, shows this much less 

 strongly than in many of the weathered sections in hand specimens. 



Lepidocyclina gigas, new species. 

 (Plate 1, Figures 3 to 5; Plate 5, Figure 4.) 



The following is a description of this species : 



Test large, flattened, somewhat lenticular, circular in outline, central por- 

 tion slightly umbonate, thence gradually thinning toward the periphery, 

 which is bluntly angular; surface generally flat and smooth, occasionally 

 slightly undulating. 



Vertical section shows the equatorial chambers increasing somewhat in 

 height from the central area toward the periphery, the peripheral end of each 

 chamber slightly convex toward the exterior; lateral chambers broad and low, 

 in vertical columns, usually from 7 to 10 chambers in each column in the 

 central portion of the test outside the umbonal region, thence gradually 

 decreasing in number toward the periphery. There are pillars developed at 

 irregular intervals, but these are few in number and of very small diameter. 



Horizontal sections show the hexagonal equatorial chambers, the annular 

 rows of which are very uneven in size. 



Diameter of largest specimens up to 80 mm. or more. 



Type specimen (U. S. N. M. No. 328196) from Antigua, Leeward 

 Islands, U. S. G. S. No. 6862, from lower bed at Hodge's Bluff; T. W. 

 Vaughan, collector. Specimens from this locality are numerous and 

 very fine. Poorer material, but apparently specifically the same, 

 occurs at 6854, Rifle Butts, and 6857, southwest side of Wetherell Mill, 

 both from Antigua. 



This species is very near to L. elephantina Munier-Chalmas, but the 

 two early chambers in the two species do not seem to be at all alike, 

 those of L. elephantina being very dissimilar in size and shape, while 

 those of L. gigas, as far as made out, seem to be much more nearly 

 equal, as is usual in American species of Lepidocyclina. 



This is a very fine, large species, abundant at the type station. 



