2IO The Ottawa Naturalist. [March 



valley as seen north of Allumette Island in two places, at Vinton, 

 Portage du Fort, and near Bristol, on the Quebec side, where 

 the course is from S. 10° E. to S. 30° E * On the south side the 

 game courses were seen north of Pembroke, at several places in 

 Ross and Bromley townships ; at Shamrock, south of Renfrew, 

 and at Galetta. In Ottawa city, "Barrack Hill,"f the course is 

 S. 45" E., and Dr. Ami reports striae on Park Avenue and 

 Nicholas Street almost due east and west.J Near Hintonburg 

 on the Ottawa, Arnprior and Parry Sound Railway, the course 

 is S. 87° E. While the south-east course is constant in the 

 valle}' close to the river, at a distance of ten to twenty miles 

 back the ice moved west of south. On the south side of the 

 river a large number of observations show the direction to be 

 from S. 2° W. to S. 35° W., the most common being from S. 15° 

 W. to S. 25° W. It is probable that the south-west course is 

 the older of the two, and that the south-east course was produced 

 when the ice had become so thin that it was deflected by 

 the minor irregularities of the surface, and so followed the 

 course of the river. At an earlier stage the ice had evidently 

 been thick enough to over-ride irregularities of surface of con- 

 siderable size, the course being south-west, as above stated, 

 where the present drainage is to the east. The south-east and 

 the south-west courses were not observed on the same surface 

 in the area under consideration, but in the vicinity of Lake 

 Temiscaming these two courses are frequently seen cross- 

 ing each other, and Mr. Barlow states that the oldest course is 

 about S. 20*^ W., while the more recent courses follow the river 

 valleys. 



Speaking generally of the glaciation of the district particu- 

 larly referred to, it may be said that good exposures of rock are 

 common where the results of ice movement can be studied- 



* The bearings are referred to the true meridian, 

 t Geology of Canada, p. 892. 

 t Ottawa Naturalist, 1887, p. 69. 



