[dawhon] 



FOSSIL SPONOES Trans. 1890. Ssc IV.— Platb IL 



■T^K*^ 



-<^ 





Fid. 5. 



Fiu. 0. 



Fig. 7. 



Fig. 8. 



Fir. 5.— Crushed specimea of Protuspongia coronata, encrusted with pyrite. 

 {Natural size.) 



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

 Fig. 7.— P. cyathtformis. (Natural size.) 

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



123 



