6 C. Lapworth — Life of Dr. J. G. Linnarsson. 



Silurian Formations of Westrogothia" — was jDublislied in the same 

 year, and is the first of a series, which was destined to make this 

 special region classic in the history of geological discovery. His 

 second paper — entitled "Contributions to the Geology of Westro- 

 gothia," — although a mere provisional sketch, was a most remarkable 

 contribution to the scientific literature of the country. It placed 

 for the first time the Lower Palaeozoic succession of rocks and fossils 

 in this region upon a reliable basis, and demonstrated the insufficiency 

 of Angelia's classification of the Swedish Transitional strata. In this 

 paper Linnarsson made known the presence of several formations 

 in Westrogothia that had remained undefined by previous inves- 

 tigators, and proposed the following scheme of nomenclature of the 

 rocks of the region, a scheme which in its broader outlines remains 

 substantially unmodified to the present day. 



9. Upper Graptolite Beds 



8. Brachiopod Shales = Angelin's Regio Harparum. 



7. Trinucleus Shales = „ Eegio Trinucleorum. 



6. Beyrichia Limestone 



5. Orthoceras Limestone = ,, Eegio Asaphorum. 



4. Lower Graptolite Shales 



3. Ceratopyge Limestone = ,, Eegio Ceratopygarum. 



2. Oleniis Shales = ,, EE. Olenorum (and Conooorypharum). 



1. Fucoid Sandstone = ,, Eegio Fucoidarum. 



Of these divisions, No. 2, or Alum Shales, answers to Angelin's 

 Eegio Olenorum and Regio Conocorypharum. Angelin had placed 

 the latter of these divisions above the former, solely upon the ground 

 that in the more typi-cal localities it was most prolific in fossils. 

 Linnarsson showed that Angelin had inverted the true order of suc- 

 cession, for in Westrogothia the Eegio Oonocorypharum actually lay 

 heloio the beds belonging to the Eegio Olenorum. He made known 

 also the presence of actual fossils (other than so-called fucoids) in the 

 basal sandstones of th^. district. The two new formations of Upper and 

 Lower Graptolite schists added by him to the Swedish sequence were 

 destined to be of prime importance in the development of the geology 

 of other areas. 



After a careful comparison of these results with the phenomena 

 presented by the corresponding Lower Palaeozoic formations of the 

 neighbourhood of Christiania, Linnarsson next published what is 

 nnquestionably his most ambitious and successful work — his memoir 

 on " The Cambrian and Silurian Succession in Westrogothia." In 

 this work the evidences for the conclusions advanced in his last- 

 mentioned paper are given in full, and are fortified by an array of 

 confirmatory evidences from other sources. Especial care is devoted 

 to the description of the Primordial Beds or Alum Shales, which 

 are divided by the author into five zones, viz. ; 



5. Beds with Peltura scarabeoides. 



4. ,, Olenus latus and 0. gibbosus. 



3. ,, Agnostus Icevigatus. 



2. ,, Faradoxides Forchammeri. 



1. ,, Faradoxides Tessini. 



Zones 1, 2, 3, answer to Angelin's Eegio Conocorypharum, and 

 zones 4: and 5 to his Eegio Olenorum. 



