Geology and Mineralogy. 395 



R. W. Ells contributes report J on the Geology of the Three 

 Rivers Map-Sheet, Quebec. North of the St. Lawrence the 

 Potsdam, Calciferous, Chazy, Black River and Trenton forma- 

 tions are recognized. Lists of the fossils collected from them 

 are reported by H. M. Ami. The "Medina" outlier south of 

 the St. Lawrence is denned. 



A. P. Low reports (L) on the South shore of Hudson Strait 

 and LTngava Bay. The rocks there met with are ancient crystal- 

 lines, igneous intrusions, altered shales and schists, dolomites and 

 iron ores, the latter possibly of Cambrian age. 



Robert Bell contributes report M on the topography and 

 geology of the northern side of Hudson Strait. The fossiliferous 

 rocks are of Trenton and Niagara age, and Devonian fossils are 

 reported from the southern side of Southampton island. A 

 remarkable feature in the geology on the north shore of the 

 strait are the twelve bands of white crystalline limestone alternat- 

 ing with bands of gneiss. Dr. Bell estimates the total thickness 

 of these limestones to be not less than 30,000 feet. Lists of the 

 plants of Hudson Strait and of the Lepidoptera of Baffin Land 

 are appended. 



The closing reports are R, The Report of the Section of Chem- 

 istry and Mineralogy, by Gr. Christian Hoffmann, and S, The 

 Report of the Section of Mineral Statistics and Mines by E. D. 

 Ingall. h. s. w. 



2. Geological Survey of Canada. Robert Bell, Acting- 

 Director. Catalogue of the Marine Invertebrata of Eastern 

 Canada; by J. F. Whiteaves ; pp. 1-271. Ottawa, 1901. — 

 The Catalogue is a report on the present state of our knowledge 

 of the marine invertebrata of the Bay of Fundy, Atlantic Coast 

 of Nova Scotia, and gulf and mouth of the River St. Lawrence, 

 as far as the Strait of Belle Isle. h. s. w. J 



3. Geological and Natural History Survey of Minnesota, r 

 1900-1901. Vol. VI of the Final Report. Geological Atlas 

 with Synoptical descriptions ; by N. H. Winchell. 88 geograph- 

 ical and geological plates with accompanying descriptive text. — 

 In this closing volume of the survey, begun twenty-eight years 

 ago, the author offers the following as his final classification of the 

 geological formations of the State of Minnesota : 



f Ft. Pierre 



ri„^+ I Niobrara 



Cretaceous \ -,-, -^ , 



Jb t. Benton 



Dakota. 



Hamilton 

 Devonian \ Marcel 1 us ? 



Lower 

 Silurian 



Corniferous. 



Hudson River 



Galena* 



Trenton. 



