OF ARTS AND SCIENCES. 



239 



In Sweden Linnarson has succeeded in giving a more complete classi- 

 fication than his predecessor, without being able to clear up certain 

 obscure points of superposition and of succession. 

 Here is the resume: — 



TABULAE VIEW OF THE LOWER PALEOZOIC ROCKS OF SWEDEN. 



Compared with the section of the Taconic System, the two lower 

 divisions represent the two groups with Eopliyton and ArenicoUtes of 

 Newfoundland, or the lower part of the St. Albans Group, — the 

 Infra-Primordial fauna. 



The " Paradoxides beds," with the six subdivisions that Linnarson 

 has found there, represent the zone with Paradoxides at Newfound- 

 land, Braintree, and St. John, New Brunswick. The '■'■ Olenus shales" 

 correspond to the Georgia slates with Olenelli, and these two zones 

 together form the true Primordial fauna. 



Then the " Dictyonema shales," added to the " Cei-atopyge lime- 

 stone " and the " Lower Graptolites shales," represent the Supra-Pri- 

 mordial, or the Groups of Phillipsburgh, Swanton, and Potsdam. 



It must be remarked that Linnarson, in placing the " Ceratopyge 

 limestone " and the " Lower Graptolites shales " in his " Ordovician 

 System," liad reached the conclusion that the fauna of Hof was not 

 Primordial, contrary to the opinion of Barraiide ; and according to his 

 memoir it ouajht to belonsr to the second fauna. 



NORAVAY. — The environs of Christiania in Norway present an 

 uninterrupted series of the Taconic System, much more complete than 

 that of Sweden. 



* From Ordovices, a people inhabiting the northern part of Britannia Secunda, 

 or Cambria, now Wales. 



