OF ARTS AND SCIENCES. 



249 



Earranrle, although having heard of the different views of Sedgwick 

 and Murchison, and the controversy which broke out in 184G and 1847 

 between tliem, could only form an opinion of the worth of Sedgwick's 

 claims by studying the question in Wales and Shropshire, which was 

 materially im{)ossible for him at that time in his life, — the little time 

 at his disposal being given to his studies on the geology of Bohemia. 



Sedgwick published his " Synopsis," wiih fossils by McCoy, in 1855, 

 so that Barrande was without it in his classificatiou of 1850, and he 

 makes no mention in his publications in the Bulletin de la Societe 

 geologique de France, 1851, nor in his first volume of the "Systems 

 Silurien du Centre de la Boheme," 1852, of the "Cambrian sys- 

 tem," of which he had no cognizance, pala:ontologically at least. Oth- 

 erwise, with his great loyalty and love of justice, Barrande would 

 doubtless have recoscnized the real rights of Sedgwick and his " Cam- 

 brian System," as he did later those of the " Taconic System," of which 

 he was equally ignorant, though published in 1846. His classification 

 once published and his great work begun, Barrande could not vary 

 from the term adopted, or change his title. 



These are Barrande's divisions of the " Silurian System " in Bo- 

 hemia. 



TABULAR VIEW OF THE " SYSTEME SILURIEN DU CENTRE 



DE LA BOHEME." 



Upper 

 Silurian. 



900 feet. 



J/. Hlulioccper j^roup. 

 (/. Braniker ixroup. 

 F. Konicpruser group. 

 E. Kuchelbader group. 



Tliird fauna. 



Silurian 

 System. 



Lower 

 Silurian. 



10,200 

 feet. 



6,000 D. ] 

 feet. 



(/''. Koenigshofer ' 



group. 

 (/*. Zahorzaner 



group. 

 (l^. Vi nicer group. 

 (/-'. Mont Drabow group. 

 r/'. Voseker group. 



Colonies of the 



tliird fauna 



exist ill both 



groups. 



Second 

 fauna. 



Cambrian 



System. 



Porphyry. 



Supra-Primordial 

 fauna wantin<j. 



only tiie Para- 

 doxides Zone. 



1,200 C. Ginecer schists, or Protozoic Primordial fauna, 

 feet. slates of Ginetz and Skrey. 



f B. Przibramer grauwacke. 

 A. Przibramer schiefer. 



0,000 . 

 feet. 1 



Infra-Primordial 



fauna wanting, 



e.xcept a few Are- 



uicolites. 



Taconic 

 System. 



Granite and Gneiss. 



