﻿166 



Proceedings of the Royal Physical Society. 



Explanation of Plate. 



Stenopora hrii^ei, ii. sp. 



Figs. 1 and 2. Two views of specimens showing mode of preservation, slightly 

 enlarged (11/9). 



Figs. 3 and 4. Peripheral portion of longitudinal sections ( x 45), showing 

 wall-structure. 



Fig. 5. Tangential section ( x 45), showing acanthopores and other features 

 of the species. 



Stenopora cidariformis, n. sp. 



Fig. 6. Peripheral portion of longitudinal section ( x 45), showing wall- 

 sti'ucture. 



Fig. 7. Tangential section ( x 45), showing extremes in thickness of walls, 

 and two sets of regularly distributed acanthopores. 



Stenojjora, sj). indet. 



Fig. 9. Longitudinal section of outer portion of immature region ( x 45), 



showing diaphragms. 

 Fig. 10, Tangential section ( x 45), showing two sets of acanthopores and 



immature zoaecia. 

 Fig. 11. Cf. Strophalosia leplayi, Geinitz, enlarged ( x 1^). 

 Fig. 12. 1 Productus, sp. indet., enlarged ( x 1^). 



