PLATE XXIII. 



Lepidocyclina chattahoocheensis Cushman, n. sp. (p. 65). 



Figure 1. Surface view, X 5. Five miles south of Jackson, Ala. (U. S. G. S. station 3647). 



Figure 2. Surface view of central portion of same specimen, showing the pitted umbonal region, X 10. 



Figure 3. Edge view of weathered specimen, X 5. Old factory about 14 miles above Bainbridge, Ga.' (U. S. G. S. 



station 3397). 

 Figure 4. Vertical section of weathered specimen, X 10. Chattahoochee formation at Cato Glenn's well, 4| miles 



southeast of Bainbridge, Ga. 



93 



