318 



PLATE IV 



Montlcnlipora interslta Ulrlch and Bassler. 



1. Tangential section X 20. 



2. Longitudinal section x 20. 



Pierce limestone. Murfreesboro, Tenn. 



Monticulipora discula Ulrich and Bassler. 



3. Tangential section x 20. 



4. Longitudinal section x 20. 



Pierce limestone. Murfreesboro. Tenn. 



Monticulioora compacta Ulrich and Bassler. 



5. Tangential section x 20. 



6. Longitudinal section x 20. 



Pierce limestone. Murfreesboro, Tenn. 



