PLATE XXXIV. 



Lepidocyclina mardonaldi Cushman (p. 77). 



Figure 1. Exterior view, X 10, showing pillars appearing at the surface as raised areas. Limestone 2 miles north of 



David, Panama (U. S. G. S. station C523). 

 Figure 2. Vertical section, X 20, showing embryonic chambers. Same locality as figure 1. 

 Figure 3. Oblique sectio-j, X 20, showing equatorial and lateral chambers with pillars. Same locality. 



Lepidocyclina panamensis Cushman (p. 77). 



Figure 4. Embryonic chambers of megalospheric form shomng spiral indications, X 85. TAmestone 2 miles north 



of David, Panama (U. S. G. S. station 6523). 

 Figure 5. Vertical section of megalospheric embryonic chambers, X 85. Near mouth of Tonosi River, Panama (U. S. 



G. S. station G586e). 

 Figure G. Section showing four specimens, all with the embryonic chambers sectioned, X 20. Same locality as 



figure 5. 

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