﻿THE 



CAISTADIAN RECOED 



OF SCIEI^CE. 



VOL. VII. JULY, 1896. No. 3. 



Canadian Stromatoporoids. 



By J. F, White AVES.i 



In Canada, as elsewhere, only the more obvious 

 characters of the Stromatoporoidea were examined by the 

 first students of this difficult group of fossils, and it is 

 probable that some of the earlier species proposed will 

 have to be abandoned, as inadequately defined. 



Of late years, however, these organisms have been 

 studied much more systematically, especially by Professor 

 H. Alleyne Nicholson, of the University of Aberdeen, and 

 the minute structure of the different species has been 

 elucidated and their probable affinities ascertained by 

 means of thin microscopic sections. 



While engaged in the preparation of his monograph of 

 the British species for the Pala^ontographical Society, 

 Professor Nicholson kindly examined and either identified 

 or described, specimens of m.ost of the Canadian species of 

 Stromatoporoids that were then represented in the 

 Museum of the Geological Survey at Ottawa, but some 

 additional material has since been received at that 

 Museum, especially an interesting series of specimens 



1 Communicated by permission of the Director of tlie Geological Survey of Canada. 



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