THE HAMILTON ASSOCIATION. 1 63 



may be owing to pressure, etc. On examination subsequently Mr. 

 Walker's magnifying glass failed to display the usual cellules of the 

 diptograpti family, but it revealed however, a peculiar structure we 

 have not remarked in any papers on the graptolites known to either 

 of us. The limestone flag (water-worn and rounded at both 

 extremities) is about 12 inches in length, 9 in breadth and 3 inches 

 in thickness, the fossils occurring on both faces, but mingled with 

 a coral (monticulipora or branching cheltetes). Probably twelve 

 generations are represented on splitting the matrix, each overlaying 

 the other regularly. I mention this because I do not think the 

 graptolites were washed up or heaped together in the manner 

 indicated by the Clinton star fishes beyond the reservoir at the 

 bluff or cliff. 



