XV.] CAMBRIAN AND SILURIAN IN EUROPE. 385 



palaeontological equivalents of the Calciferous, Levis and Chazy, 

 which serve in North America to connect the Middle with 

 the Upper Cambrian. As regards the extension to the Upper 

 Cambrian of Sedgwick of the name of Lower Silurian, which, 

 as has been shown, was given to it only through an enormous 

 and now universally acknowledged mistake on the part of 

 Murchison, I am constrained, notwithstanding its adoption by so 

 many eminent geologists, to maintain for the division the name 

 given to it by its true discoverer, Sedgwick.] 



In the third column, the subdivisions are those of the New 

 York and Canada Geological Surveys ; in connection with 

 which the reader is referred to a table which I prepared and 

 published in 1863, in the Geology of Canada, page 932. Op- 

 posite to the Menevian I have placed the names of its principal 

 American localities; which are Braintree, Massachusetts, St. 

 John, New Brunswick, and St. John's, Newfoundland. The 

 further consideration of the American subdivisions is reserved 

 for the third part of this paper. "With regard to the classification 

 of Angelin, it is to be remarked that although he designates II. 

 as Regio Olenorum, and III. as Eegio Conocorypharum, the 

 position of these, according to Linnarsson, is to be reversed ; 

 the Conocoryphe beds with Paradoxides being below, and not 

 above, those holding Olenus. The Regio Fucoidarum in 

 Sweden has lately furnished a brachiopodous shell, Lingula 

 monilifera, besides the curious plant-like fossil, Eophyton 

 Linnceanum. (Linnarsson, Geol. Magazine, 1869, VI. 393.) 



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