364 CAMBRIAN AND SILURIAN IN EUROPE. [XV. 



and was withdrawn in 1854 by Sedgwick, who reclaimed the 

 name of Upper Cambrian for his Bala group. 



In June, 1843, Sedgwick proposed that the whole of the 

 fossiliferous rocks below the horizon of the Wenlock should Ixj 

 designated Protozoic, and on the 29th of November, 1843, 

 presented to the Geological Society an elaborate paper on the 

 Older Palaeozoic (Protozoic) Rocks of North Wales, with a 

 colored geological map. This paper, which embodied the 

 results of the researches of Sedgwick and Salter, was not, 

 however, published at length, but an abstract of it was pre- 

 pared by Mr. Warburton, then president of the society, with a 

 reduced copy of the map. (Proc. Geol. Soc., IV. 212 and 

 251 -'268 ; also Geol. Jour., I. 5 - 22.) In this map of Sedg- 

 wick's three divisions were established, namely, the hypozoic 

 crystalline schists of Caernarvonshire, the " Protozoic " and the 

 " Silurian." On the legend of the reduced map, as published 

 by the Geological Society, these latter names were altered so 

 as to read " Lower Silurian (Protozoic)" and " Upper Silurian." 

 These changes, in conformity with the nomenclature of Mur- 

 chison, were, it is unnecessary to say, made without the 

 knowledge of Sedgwick, who did not inspect the reduced and 

 altered map until it was appealed to as an evidence that he had 

 abandoned his former ground, and had recognized the equiva- 

 lency of the whole of his Cambrian with the Lower Silurian of 

 Murchison. The reader will sympathize with the indignation 

 with which Sedgwick declares that his map was "most un- 

 warrantably tampered with," and will, moreover, * learn with 

 surprise that an inspection of the proof-sheets of Warburton's 

 abstract of Sedgwick's paper was refused him, notwithstanding 

 his repeated solicitations. The story of all this, and finally of 

 the refusal to print in the pages of the Geological Journal the 

 reclamations of the venerable and aggrieved author, make 

 altogether a painful chapter, which will be found in the 

 Philos. Magazine for 1854 ((4) VII. pp. 301-317, 359-370, 

 and 483-506), and more fully in the Synopsis of British 

 Palaeozoic Rocks, which forms the Introduction to McCoy's 

 British Palaeozoic Fossils. 



