334 



PLATE XII 



Graptodictya fruiticosa n. sp. 



1. Longitudinal section x 18. 



2. Tangential section x 18. 



Pierce limestone. Walter Hill, Tenn. 



Graptodictya dendroidea n. sp. 



3. Tangential section x 18. 



4. Longitudinal section x 18. 



Pierce limestone. Walter Hill, Tenn. 



Rhinidictya tabulata n. sp . 



5. Longitudinal section x 20. 



6. Tangential section x 18. 



Pierce limestone. Murfreesboro, Tenn. 



