PLATE XXII. 



Fig. 1. — Tangential section of Stromatopora typica, Rosen, from the Wenlock 

 Limestone of Ironbridge, enlarged about 10 times. 



Fig. 2. — Vertical section of the same, similarly enlarged, showing the tabu- 

 late zooidal tubes. 



Fig. 3. — Vertical section of Stromatopora Hiipschii, Barg., from the Middle 

 Devonian of Teignmouth, enlarged 10 times. 



Fig. 4. — Tangential section of the same, similarly enlarged. 



Fig. 5. — Surface of a polished specimen of the same from the same locality, of 

 the natural size. 



Fig. 6. — Surface of a specimen of Stromatopora Hiipschii, Barg., from the 

 Middle Devonian of Bfichel (Paffrath district), enlarged 5 times, showing the 

 mouths of " Caunopora-tubes." 



Fig. 7. — A weathered example of Stromatopora Hiipschii, Barg., in the 

 " Caunopora-state," of the natural size. Middle Devonian, Dartington, South 

 Devon. 



Fig. 8. — A small polished example of Stromatopora florigera, Nich., of the 

 natural size, from the Middle Devonian of Teignmouth. 



Fig. 9. — Tangential section of the same, enlarged 10 times. 



Fig. 10. — Vertical section of the same, similarly enlarged. 



