THE HAMILTON ASSOCIATION. 143 



William, must have culminated in regard to size, abundance and 

 range of organization at a very early geological period. In fact we 

 have very conclusive evidence of that in the neighborhood of this 

 city — Hamilton. At the same time I believe that many of the sup- 

 posed annelid trails, cas^s or burrows may yet be classified as marine 

 plants or true fucoids. I have much pleasure in submitting for the 

 examination of the Section photographs of specimens of Clinton 

 slabs from Hamilton, as given in Sir Wm. Dawson's paper. His 

 suggestion that the worm-like stem of a lingula may have formed 

 such burrows as we see occasionally seems so probable that I fancy 

 many must concur in that. 



