PLATE XX. 



Lepidocyclina gigas var. mexicana Cushman, n. var. (p. 63). 



Figure 1. Surface view of type specimen, X 2. iteson formation, Meson, Vera Cruz, Mexico. 



Figure 2. Surface view of portion of same specimen, X 15, showing pitted, reticulate pattern produced by the erosion 

 of the surface. 

 90 



