PLATE I. 



Page. 



Fig. 1. Opegrapha antiqua, Gr. 1 36 



1 a. Peritbecia, niagnifled four diameters. 

 1 b. Porithecia, magnified eight diameters. 



1 c. Cross-section of 1 h. 



Fig. 2. I^clerotidm eubellum, Gr. 1 35 



2 a to/. Peritbecia, magnified, and cross-section. 



Fig. 3. Spheria LAPiDEA,Gr. 1 34 



Fig. 4. Spheria hiyric^, Gr. 1, 4 a 34 



Fig. 5. Spheria i;u ytismoides, Gr. 1 35 



5 a. Magnified receptacles. 



Fig. C. Halymenites .striatus, Gr. 1 37 



Figs. 7,8. Halymenites major, Gr. 1, 3 33 



Fig. 9. Halymenites minor ?, Gr. 1 39 



Fig. 10. Dele.'seria fulva, Gr. 1 39 



Figs. 11, 12. Caulerpites incrassvtus, Gr. 1 40 



Fig. 13. Chondrites subsimpi.ex, Gr. 1 41 



Fig. 14. Chondrites ntii.nnstTS, Or. 1 42 



