SFONG-ES, SILURD-CAMHRIRN, LITTLE METIS, 

 Trans. R. S. C, 1889. Sec. IV. Plate III. 





<y^m 



(From Photographs. ) 



çWPO; 



Figs. I and 2. Protospongia tetranema, 3. P. mononema, 4. P. coronata, 5. P. polynema,/' 6. P. cyathiformis,.- -. ^^^ 



7. Cyathospongia Quebecensis, 8. Acanthodictya hispida. jV A' J 



Iks. «^ SOCIETY.* 



To ILLUSTRATE SiR WiLLIAM DAWSON'S PaPER ON FoSSIL SpOî 



■TF.D 



AHTOTrPE. PATENTED; C*H*OA BANK NOTE CO-, LIMITED, MONTREAL. 



