NO. lO AMERICAN SPECIES OF LEPIDOCYCLINA — VAUGHAN 1 7 



The variations in the papillae are extraordinary. Plate 9, figures i, 

 2, represent external views, X 5, of three topotypes from Hodge Bay, 

 Antigua. Originally, I had six specimens photographed, but I am 

 publishing illustrations of only three of them. The progression in 

 size of the papillae from the right hand to the left hand figure is 

 obvious. The series of six microspheric specimens, X 5, represented 

 by plate 9, figure 3, are from the same lot of specimens collected 

 along the railroad, 7 km east of Los Naranjos, State of Vera Cruz, 

 Mexico. The range of variation from scattered papillae in the 

 specimen at the lower right-hand corner to large bosses over the 

 central area in the specimen in the upper left-hand corner is shown. 

 Figure 4 illustrates six, probably megalospheric, specimens, X 10. 

 selected from the same lot of specimens as those represented by 

 figure 3. As the illustrations speak for themselves, further comment 

 is unnecessary. 



Plate 10, figures i and 3, represent opposite sides, X 10, of the 

 same specimen from Lynch ClifT, Antigua. It will be noticed that 

 on one side some costae extend to the edge of the test, w^iile on the 

 other side there is a rim without costulation. Figure 2 represents a 

 specimen, X 10, from Hudson Cove, Antigua. Figures 4 and 5 

 illustrate two megalospheric specimens from the tilted beds, east of 

 Lynch Qifif, Antigua. Figure 4 is an outside view, X 10. Figure 5 

 represents an equatorial section by reflected light, X 20, and shows 

 that the species has the embryonic chambers of LepidocycUna, s.s., and 

 that its equatorial chambers are hexagonal to spatulate near the 

 periphery, but near the center they tend to be lozenge-shaped. This 

 form grades into the variety, L. parvula var. crassicosta, next to be 

 described. Plate 10, figure 6, illustrates two specimens, X 10, from 

 Lynch Path, altitude 150 feet, Antigua. These specimens should be 

 compared wath those represented by plate 9, figure 3, especially those 

 in the upper row. 



Localities and geologic horizon. — The principal localities in Antigua 

 and eastern Mexico have been given above. It also occurs in the 

 Moneague formation of Jamaica. Its geologic horizon is middle 

 Oligocene, Antigua and Meson formations. It is widely distributed 

 geographically in the Caribbean and Gulf of Mexico regions. 



LEPIDOCYCLINA PARVULA Cushman var. CRASSICOSTA Vaughan and 

 Cole, n. var. 



Plate 8, figs. I, 2; plate 10, fig. 7; platt -q, fig. i 

 Test small, lenticular, thick through the center, faintly polygonal 

 in outline, usually with an encircling rim. The width of the rim 



