1899] 



Notes, Reviews and Comments. 



203 



SpongijB 



Alcyonaria 



Zoantharia Rugosa . 

 Zoanlharia Tabulata 



Hydroida 



Crinoidea 



Blastoidea 



Asteroidea 



Vermes 



Polyz )a 



Brachiopoda 



Pelecypoda 



Gasteropoda 



Pteropoda 



Cephalopoda .... 



Ostracoda 



Phyllopoda 



Trilobita 



Pisces 



141 225 



It will thus be seen that from the Hamilton formation of 

 Ontario there are no less than 225 species already reported upon 

 in Canada, showing how varied the life was in those earl)' seas. 

 Comparing these results with those obtained in New York State 

 across lakes Ontario and Erie, it can be readily seen that 

 a great deal has already been done in Canada, also that 

 future years will no doubt reveal a large amount of material 

 as yet unrecorded in Canada. The remarkable similarity in 

 the succession of life-zones in the Hamilton formation of 

 Canada and New York State has been pointed out by Prof. 

 H. S. Williams, now of Yale, and shows that no barrier existed 

 in the Devonian times in the Ontario-New York Basin to 

 prevent free migration of forms to and fro. 



An interesting point to ascertain at present in the province 

 of Quebec is to what extent the various life-zones of the 

 Devonian of that province correspond with those of Ontario or 

 of New York State ; also the extent and distribution of the 

 various geological formations of the province of Quebec in 

 Devonian times, — H. M. A. * 



