502 REVIEWS 



DowLiNG, D. B. West Shore and Islands of Lake Winnipeg: Geol. Survey 

 Canada, Ann. Rept., Vol. XI, Part F, loo pp., iqoi. Published as a 

 separate in 1899. 



Superficial deposits are discussed on pp. 93-100, and include till, drumlins, 

 reasserted bowlder clay, stratified sands and gravels, and lake beaches. The bearings 

 of striae are also given, and a map of part of Lake Winnepeg shows striae and drumlins. 



DowLiNG, D, B. East Shore of Lake Winnipeg and Adjacent Parts of 

 Manitoba and Keewatin. Geol. Survey Canada, Ann. Rept., Vol. XI, 

 Part G, 98 pp. 1901. Published as a separate in 1899. 

 This report is edited from notes by J. B. Tyrrell. While dealing mainly with the 



hard-rock geology, there are brief references at various points to glacial deposits, 



lacustrine deposits,- striae, potholes, etc. The eastern limit of lacustrine deposits is 



noted (p. 43). 



DowLiNG, D. B. The West Side of fames Bay. Geol. Survey Canada, Sum- 

 mary Rept. for 1 901, pp. 107-15, 1902. 



A traverse was made on the west shore of James Bay, and a survey of Equan 

 River. The deltas of Moose and Albany rivers are briefly described. Clays with 

 marine fossils occur up to nearly 400 feet above tide in the vicinity of Sutton Mill 

 Lake. 



DowLiNG, D. B., and J. B. Tyrrell. (See Tyrrell.) 



Ells, R. W. Three Rivers Map Sheet of Quebec. Geol. Survey Canada, 

 Ann. Rept., Vol. XI, Part J, pp. 63, 1901. (Published as a separate 

 in 1900.) 



The occurrence of marine shells in sand or gravel above clay is apparently 

 restricted to the vicinity of the St. Lawrence River, none having been noted on the 

 high areas to the north. Striae are rather rare because of the limited outcrop of Paleo- 

 zoic rocks and because weathered quickly from the gneiss. The general bearing is 

 north-south. 



Ells, R. W. Ancient Channels of the Ottawa River. Ottawa Nat., Vol. XV, 



pp. 17-30, with map, 1901. 



The paper opens with a reference to the Ottawa as one of the great historic water- 

 ways, Chaniplain having ascended it in 161 5, and crossed the portage at Lake Nipis- 

 sing, " presumably the first white man to gaze upon the vast expanse of our inland 

 seas," while afterward the river became the chosen route of the voyageurs inland to 

 the great unexplored country, and the principal channel for the business of the Hud- 

 son Bay Company. The geologic history of the river is made to begin far back of 

 the Glacial epoch, though it is recognized that marked changes were produced by 

 glaciation. Borings show that part of the lower course has a rock floor below the sea 

 level, and the depth of Lake Temiscaming (470 feet) brings its bottom to within 121 

 feet of sea level. The valley is thought to have experienced several cycles of uplift 

 and depression. The author inclines to the view that a postglacial marine sub- 

 mergence covered lands between the Ottawa and Hudson Bay now standing over 

 1,000 feet above sea level. 



The paper deals mainly with the departures of the present stream from a deep 



