52 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 89 



Fig. 3. Lepidocyclina? sp. indet. d, also from locality no. 7664. Vertical section, 

 X 55, to show the peculiar arrangement of equatorial and lateral 

 chambers. 



Plate 26 



Figs. 1-3. Lepidocyclnm (Nephrolepidim) dartoni Vaughan, n. sp., from U.S. 

 G.S. locality no. 7664, north slope of La Piedra, northeast of Ja- 

 maica, northeast of Guantanamo, Cuba, collected by N. H. Darton. 

 Fig. I, oblique section, X 20, showing some of the equatorial 

 chambers. Figs. 2, 3, vertical sections, X 20, of megalospheric 

 individuals. 



Fig. 4. Lepidocyclina (Eulcpidina) sp. cf. L. dilatata (Micht) Giimbel, also 

 from U.S.G.S. locality no. 7664. Surface view, X 2, to show the 

 small umbo and characteristic appearance of the surface. 



Fig. 5. LepidocycBia sp. indet. a from U.S.G.S. locality no. 7664. Vertical sec- 

 tion, X 20, showing the inflated test and the striking regular tiers 

 of lateral chambers. 



Plate 27 



Figs. 1-3. Lepidocyclina {Nephrolepidiim?) crassimargo Vaughan n. sp., from 

 U.S.G.S. locality no. 7664, north slope of La Piedra, northeast of 

 Jamaica, near Guantanamo, Cuba, collected by N. H. Darton. 

 Fig. I, vertical section, X 20. Fig. 2, cotype, X 20, shows the 

 expanded marginal portion as seen in a fragmentary vertical sec- 

 tion. Fig. 3, cotype, X 20, represents the type of equatorial 

 chambers observed in a slightly oblique section. 



Fig. 4. Lepidocyclina (Nephrolcpidina) piedrasensis Vaughan, n. sp., from U.S. 

 G.S. locality no. 7664. Vertical section, X 20, of a megalospheric 

 individual. 



Figs. 5, 6. Lepidocyclina (Eulepidiim) sp. cf. L. dilatata (Micht) Giimbel from 

 U.S.G.S. locality no. 7664. Fig. 6, X 20, represents a continuation 

 of the same vertical section as seen in fig. 5. The eulepidine em- 

 bryonic chambers and the elongate, compressed equatorial chambers 

 are well illustrated in these figures. 



Plate 28 



Lepidocyclina (Eulepidina) sp. cf. L. dilatata (Micht) Giimbel from U.S.G.S. 

 locality no. 7664, north slope of La Piedra, northeast of Jamaica, northeast 

 of Guantanamo, Cuba. All figures represent portions of the same vertical 

 section, X 20. The undulate character of the test as well as the internal 

 details can be observed in this section. 



Plate 29 



Figs. 1-3. Lepidocyclina (Lepidocyclina) supera (Conrad). Figs, i, 2, arc 

 external views, X 10, of two specimens from the Alazan-Moyutla 

 crossing over the Rio Buena Vista, Canton of Tuxpan, State of 

 Vera Cruz, Mexico, collected by T. W. Vaughan and D. R. 



