Prof. C. Lapworth — Life and Worlcs of Llnnarsson. 121 



ably upon the Archgean, and supporting a series of shales, represent- 

 ing the Alum Shales of the south in both divisions, and containing 

 the typical Primordial fossils. Above these succeeded a limestone 

 representative of the Orthoceras Limestone of the south, containing 

 an abundance of the usual characteristic forms. 



Before publishing these discoveries, Linnarsson made a tour of 

 investigation through the Lower Palaeozoic district of Scania, in 

 Southern Sweden, already made familiar to geologists through the 

 publications of Angelin and his pi'edecessors, and more recently 

 through the papers of Dr. Tornquist. This tour was prolific of the 

 most brilliant results. Linnarsson discovered proofs of his own views 

 of the succession at every stage, and was able to satisfy geologists of 

 its identity with that already worked out by himself in Westrogothia. 

 In addition, he ventured to parallel some of the formations with 

 their British equivalents. His arrangement is as follows : — 



12. Upper Graptolite Shales {= Coniston and Gala Groups of Britain). 

 11. Brachiopod Shales. 

 10. Trinueleus Shales. 



9. Chasmops Limestone. 



8. Middle Graptolite Schists (divisible into three zones, and represented in Britain 

 by the Llandeilo Beds and Moffat Shales) . 



7. Orthoceras Limestone. 



6. Lower Graptolite Shales (=the Skiddaw Slate of England). 



5. Ceratopyge Limestone. 



4. Dictyonema Beds. 



3. Olenus Beds (^the Lingula Flags of Britain). 



2. Paradoxides Beds (=the Menevian of Britaia). 



1. Sandstone. 



In addition, the more recent Klinte Sandstone was noticed, and 

 assigned to the Ludlow, a parallelism already arrived at by Lundgren. 

 The new title of Dictyonema Shales was proposed by Linnarsson for 

 the highest zone of the Alum Shales with Dictyonema, answering 

 to part of the Tremadoc Shales of North Wales. 



During the same year Linnarsson wrote the description illus- 

 trating the sheet " Latorp " of the Swedish Survey, including in the 

 memoir the results of his discoveries to this date, and giving much 

 valuable original matter respecting the character and arrangement of 

 the crystalline strata and the superfi.cial accumulations of the country. 

 In a paper on the Brachiopoda of the Paradoxides beds of Sweden, 

 published during the year 1875, Linnarsson for the first time sepa- 

 rated the Lower Cambrian or Paradoxides beds of Sweden into 

 their natural subdivisions. The zones he recognized are given as 

 follows : — 



6. Beds with Agnofitus Icevigatus. 



5. ,, Paradoxides Forchhmmneri. 



4. ,, ,, Olandicus. 



3. ,, ,, Davidis. 



2. ,, ,, Tessini. 



1. ,, ,, Kjerulfl. 



The zone with P. Olandicus was referred to the fourth place in the 



series with doubt, and it is only within the past few months that its 



true place has been found by Dr. Nathorst to lie between Zones 1 & 2. 



. The summer of 1875 was devoted by Linnarsson to the investiga- 



