448 Sii' W. Dawson — The Animal Nature of Eozoon. 



layers. The Grenville Series may thus be regarded as one of the 

 great calcareous systems, comparable with those of the Paleozoic 

 period, which it also rivals in its association with carbonaceous 

 and ferruginous deposits. Though minute globular forms, probably 



Fig. 3. — Arrangement of beds in yalley of Calumet Eiver — {a) Upper gneiss ; 

 [h) Limestone partly covered with soil ; (c) Included bed of gneiss ; {d) Lower 

 gneiss. 



organic, have been found in the Middle Limestone, that of Long 

 Lake, Eozoon proper is confined, so far as known, to the Upper 

 Limestone, known specially as the Grenville Band. This band and 

 its accompaniments I have myself studied in the region north of 



Fig. 4. 



the Ottawa, at the Augmentation of Grenville, near the Calumet, in 

 the quarries opposite Lachute, at Cote St. Pierre, at Montebello, at 

 Buckingham, and Templeton, as well as in some of the districts 

 west of the Ottawa, where the same limestone is supposed to recur. 



Fig. 5. 



Figs. 4 and 5. — Bent and dislocated Quartzite, in contorted schists interstratified 

 with Grenville Limestone, near Montebello. The quartzites have been broken 

 and displaced, while the schists have been bent and twisted. In the immediate 

 vicinity the same beds may be seen slightly inclined and undisturbed. 



Everywhere it is a large and regular bed, sometimes with even 

 strike and dip, but at intervals thrown into violent contortions along 

 with the enclosing beds, in the manner usually seen in dist^^rbed 

 strata of later age, where it is common to find portions little affected 



