[DAWSON ] 



FOSSIL SPONGES Trans. 1896. Sec. IV.— Plate II- 



Fig. 5. 



Fig. 6. 



Fig. 7. 



Fig. 8. 



Fig. 5.— Crushed specimen of Protospongia coronata, encrusted with pyrite. 

 (Natural size.) 



Fig. 6.— Smaller perfect specimen of the same. (Natural size.) 



Fig. l.~P. cyathiformis. (Natural size.) 



Fig. 8. — The same. Young specimen enlarged. 



12S 



