Prof. C. Lapioorth — Life and Works of Linnarsson. 119 



VI. — The Life and Work of Linnarsson. 



By Prof. Chas. Lapworth, F.G.S. 



{^Continued from page 7.) 



DURING- the year 1871, in connexion with his duties upon the 

 Geological Survey of Sweden, Linnarsson made a careful study 

 of the Lower Palaeozoic strata of Dalarne and Jemtland, publishing 

 the fruits of his observations in the following year. Dalarne had been 

 already most successfully investigated by Dr. Sven. Tornquist ; but 

 Linnarsson, familiar with details of the better known succession in 

 Westrogothia, was enabled to throw much new light upon the 

 crumpled and shattered strata of this region. 

 In Dalarne Linnarsson recognized : — 



3. Trinucleus Shales. 

 2. Chasmops Limestone. 

 1. Orthoceras Limestone. 



6. Leptena Limestone of Tornquist. 

 5. Upper Graptolite Shales. 

 4. Brachiopod Shales ? 



The Leptena Limestone of Tornquist he placed upon a higher 

 horizon than the highest of the fossil-bearing zones of his native 

 Westrogothia. 



In Jemtland the Palaeozoic strata appear to be locally metamor- 

 phosed, and the study of the succession is much more difficult. 

 Nevertheless, Linnarsson was able to make out a similar succession 

 consisting of the following members : — 

 8. Pentamerus Limestone. 



7. (?) 



6. Chasmops and Graptolite Beds. 



5. Orthoceras Limestone. 



4. Lower Graptolite Beds. 



3. Ceratopyge Limestone? 



2. Alum Shales. 



1. Quartz ite. 



In the summer of 1872 Linnarsson, in order to gain information 

 bearing upon the survey of the Swedish district embraced in the 

 sheet Latorp, made a scientific tour through Central Europe and the 

 Eussian Baltic Provinces. In Copenhagen he studied the fine collec- 

 tion of Lower Palgeozoic fossils collected by Prof. Johnstrup from 

 the rocks of Bornholm. Thence he proceeded to Berlin, where he 

 studied the assemblage of Palceozoic fossils collected by Beyrich and 

 others from the erratic blocks of the drift of Northern Germany. 

 His personal acquaintance with the Swedish succession led him to 

 the conclusion that few of these erratics could have been brought 

 from Southern Sweden, but that the vast majority had their sources 

 in the islands of the central parts of the Baltic — Gothland, Olaud, 

 and Oesel. From Berlin Linnarsson proceeded to Dresden, ex- 

 amined the mineralogical collection of that city, and made a brief 

 study of the geology of the neighbourhood under the guidance of 

 the veteran Geinitz. 



The Primordial region of Hof was next examined, and on the 

 ground of the facies of the Trilobite fauna, Linnarsson reached the 

 conclusion that its typical zones belonged rather to the second than 

 to the first fauna of the Cambrian. 



A delightful three weeks was next spent in the study of the 

 classic rocks and fossils of Bohemia. Linnarsson was guided through 

 the treasures of the magnificent collection at Prague by the illus- 



