332 
PLATE XI 
Stromatotrypa lamellata n. sp. 
1. Vertical section x 20, showing supposed layers. 
2. Tangential section x 20. 
Pierce limestone. Murfreesboro, Tenn. 
Stromatotrypa incrustans n. sp. 
3. Vertical section x 18. 
4. Tangential section x 18. 
Pierce limestone. Blackman, Tenn. 
Stromatotrypa regularis n. sp. 
5. Tangential section x 18, showing pentagonal-like zooecia. 
6. Longitudinal section x 18. 
Pierce limestone. Blackman, Tenn. 
