404 Canadian Record of Science. 



Besides the foregoing species of Orthoptera, there are 

 others on our lists. Some of these are, however, synonyms, 

 while the occurrence of others within our limits is still 

 doubtful. 



Additional species will undoubtedly be discovered when 

 more attention has been given to the order, and the remoter 

 districts thoroughly worked up. 



On the Correlation of the G-eological Struct- 

 ure of the Maritime Provinces of Canada 

 with that of "western europe. 



By Sir Wm. Dawson, F.R.S., etc. 



{Abstract.) 



As early as 1855, in the first edition of Acadian Geology, 

 the author had indicated the close resemblance in structure 

 and mineral productions of Nova Scotia and New Bruns- 

 wick with the British Islands, and in subsequent editions 

 of the same work, further illustrations were given of this 

 fact. Becent researches by Bailey, Matthew, Fletcher, Ells 

 and others, had still more distinctively indicated this re- 

 semblance, as well as the distinctness of the Maritime Geo- 

 logy from that of the great interior plateau of Canada and 

 the United States. In short, as argued by the author in his 

 recent address before the British Association, the geology 

 of the Atlantic margins of America and Europe is substan- 

 tially the same, and distinct from that found west of the 

 Apalachians in America and in Central and Eastern Europe. 

 In this fact has originated much of the difficulty experienced 

 in correlating the geological formations of Eastern Canada 

 with those of Ontario, of New York and Ohio, as well as 

 similar difficulties in Europe which have led to much con- 

 troversy and difference of classification and nomenclature. 

 One object of the present communication was to show that 

 the system of classification of Palseozic sediments, employed 

 for the interior plateau of the American continent, required 

 very important modifications when applied to the Atlantic 



