NO. IQ AMERICAN SPECIES OF LEPIDOCYCLINA ^VAUGHAN 49 



Fig. I. Vertical section, X 20, megalospheric form. 



Figs. 2, 3. Vertical section, X 20, microspheric form ; fig. 3 fits on the upper 



end of fig. 2. 

 Fig. 4. Part of a horizontal section, X 20, near the periphery, showing the 



equatorial chambers. 



Plate 15 



Figs. 1,2. LepidocycUna (Nephrolepidina) tantoyucensis Vaughan and Cole, 

 n. sp., from locality M92V, about 4.5 km from Chila Cortaza, on 

 the road to Tantoyuca, about 10 km east of Tantoyuca, Mexico, 

 collected by T. W. Vaughan and D. R. Semmes. Fig. i, vertical 

 section, X 20, of a microspheric individual. Fig. 2, horizontal sec- 

 tion, X 20, of a megalospheric individual. 



Figs. 3-5. LepidocycUna {Nephrolepidina) semmesi Vaughan and Cole, n. sp. 

 from locality D.R.S. 26 near Tamemas, in the Tantoyuca district, 

 at the west end of the second east- west hill north of Peregrine, 

 Mexico, collected by D. R. Semmes. Figs. 3, 4, oblique section, 

 X 20, of a specimen showing embryonic chambers. Fig. 5, vertical 

 section, X 20, of another specimen, probably a megalospheric 

 individual. 



Plate 16 



LepidocycUna (Nephrolepidina) vaughani Cushman. 



Fig. I. Vertical section, X 20, of a topotype from U.S.G.S. locality no. 6021, 

 limestone along the relocated line of the Panama Railroad, opposite 

 San Pablo, Panama Canal Zone, collected by T. W. Vaughan and 

 D. F. MacDonald. 



Fig. 2. Vertical section, X 20, from Half Moon Bay, Antigua, collected by W. R. 

 Forrest. 



Fig. 3. Horizontal section, X 20, of specimen from Half Moon Bay, Antigua, 

 collected by W. R. Forrest. 



Figs. 4, 5. Parts of same specimen, X 20, topotype, U.S.G.S. locality no. 6021, 

 Panama Canal Zone. Fig. 4, section, X 20, near the periphery to 

 show the lozenge-shaped equatorial chambers. Fig. 5 shows the 

 embryonic chambers, X 20, and the fine papillae on the surface 

 near the center of the test. 



Plate 17 



LepidocycUna (Eulepidina) favosa Cushman. All specimens from Espinal, 

 Vera Cruz, Mexico, collected by W. S. Adkins. 

 Fig. I. Surface view, X 2, of six microspheric specimens. 

 Fig. 2. Surface view, X 5, of two megalospheric specimens. 

 Fig. 3. Surface view, X 10, of a megalospheric specimen. 



