490 Prof. Gartvood — Calcareous Alga. 



Sandstone Series of North-Western Spitzbergen " gave the following 

 correlation : — 



Spitzbergen. ThicTiness. Scotland. 



Wijde Bay Series . 2,000 metres . . Upper Old Eed. 



Grey Hoek Series . 2,000 ,, . . Middle Old Eed (Orcadian). 



Wood Bay Series . 2,500 ,, . . Lower Old Ked (Caledonian). 



Red Bay Series . . 2,300 ,, . . Downtonian. 



For want of guide fossils in the Grey Hoek Series its contemporaneity 

 with the Middle Old Red is not proved. A paper on Periodicity of 

 Palaeozoic orogeuic movements by T. C. Charaberlin and R. T. 

 Chamberlin was also read. Six papers on tectonics and many 

 miscellaneous papers were contributed, among which two papers on 

 the geology of Argentina, by H. Keidel and Bailey Willis respectively, 

 deserve special mention. 



No account of the meeting of the Geological Congress in Canada 

 would be complete without a reference to the excursions, which were 

 to many the most attractive feature. Twelve excursions were 

 arranged to take place before the meeting. The chief of these 

 were that to Quebec and the Maritime Provinces, led by G. A. Young, 

 J. M. Clarke, E. R. Faribault, etc., occupying nineteen days ; that 

 to Hali burton-Bancroft (Outai'io), conducted by F. U. Adams and 

 A. E. Barlow, seven days; and that to Sudbury-Cobalt-Porcupine 

 (Ontario), led by W. G. Miller, ten days. Ten short excursions took 

 place during the meeting and nine excursions after the meeting. 

 The chief of these were the two great transcontinental excursions, 

 C 1, by the Canadian Pacific main line over the Kicking Horse Pass 

 to Victoria, Vancouver Island, and back, twenty-three days, and C 2, 

 by the Crow's Nest Pass to the same place and back, twenty-three 

 days, and last, but not least, C 8, to Yukon and Malaspina and back, 

 tweiit}'-five days. The excursions were splendidly organized, and in 

 connexion with them guidebooks, in ten sections, divided into thirteen 

 handbooks, were prepared. These comprised a total of 2,012 pages, 

 illustrated by 154 maps, mostly coloured, 41 sections or drawings, 

 and 281 process reproductions of photographs. They not only 

 summarize pre-existing knowledge, but contain much new material. 



If in this short account little has been said of the public functions, 

 such as the conferring of honorary degrees and the unveiling at Perce 

 and at Ottawa of memorial tablets to Sir William Logan, strict 

 limitations of space must be the writer's excuse. 



III. — On the Important Pakt played by Calcareous Alg^e at 

 CERTAIN Geological Horizons, with Special Reference to the 

 Paleozoic Rocks. 



By Professor E. J. Garwood, M.A., V.P.G.S.^ 

 (Continued from the October Number, p. 446.) 



IT is now time to turn to the consideration of the part played by 

 these organisms in the formation of sedimentary rocks through 

 the successive geological periods. 



^ Edited and slightly abridged with the author's permission from the original 

 Address as delivered at Birmingham, before Section C at the British Association 

 meeting. 



