Prof. 0, Lapicorth — Life and Works of Linnarsson. 173 



detected in Scandinavia, forming the type species of the lowest 

 Trilobite zone throughout the peninsula and the neighbouring 

 islands. In 1877 he gave a careful analysis and description of tlie 

 forms composing the fauna of a second horizon in the " Primordial 

 Zone " of Oland, characterized by the strange form Paradoxides 

 Olandicus (Sjogren). This horizon, placed by Sjogren in the higher 

 part of the Paradoxidian, is at present, thi'ough the researches of Dr. 

 Nathorst and Prof. Brogger, of Christiania, known to be actually 

 situated immediately above the zone of P. Kjeridfi, as suggested by 

 Linnarsson himself many years ago, in opposition to the physical 

 testimony apparent at the time. Linnarsson's elaboi'ate paper upon 

 " The fauna of Conocoryphe Exsulaus Limestone " has been already 

 referred to at length in these columns. His last paper upon 

 Trilobites is entitled " On the species of fossils in the Swedish bed 

 with Peltura scarabeoides." It was published in 1880, and gives a 

 most exhaustive description of the Swedish fauna of this special zone 

 of the Upper Cambrian, which answers to the Dolgelly Group of 

 Belt, and the well-known Olenus-bearing black shales of Malvern ; 

 at least six out of the nine forms noticed by Linnarsson being 

 common to the British and Scandinavian strata of the zone. 



The chief fruit of Linnarsson's studies of the Brachiopoda was 

 his well-known paper on the " Brachiopoda of the Paradoxides Beds 

 of Sweden," written in English and published in the year 1876. In 

 this memoir he gave a minute description of the eleven forms 

 occurring in the Swedish deposits of this age (many of them being 

 new species), illustrated with excellent figures, and tables showing 

 the sequence and fossils of their containing beds. 



Of late years Linnarsson, as we have already pointed out, devoted 

 special attention to the Graptolithina, which interested him greatly 

 because of their value as geological indices of the position of their 

 containing zones. He published, however, only two paleeontological 

 memoirs upon the group. The first (on the Graptolites of Goth- 

 land) I have already noticed (Geol. Mag. 1880, p. 68). The second 

 (on the Graptolites of the Zone of M. twriculatm near Motala) was 

 published just before his death. It is altogether an excellent 

 memoir upon this new subject ; and it shows how earnestly and 

 thoroughly Linnarsson performed his paleeontological work, and 

 with what patience and care he must have devoted himself to the 

 study of these formerly neglected fossils. 



The winter before his death Linnarsson completed the geological 

 mapping of the sheet " Vreta Kloste," and wrote a description for 

 the press. In addition he prepared a monograph upon the " Lower 

 Paradoxides Beds of Andrarum," giving an account of the strati- 

 graphy of the component beds and an extended description of the 

 included fossils, of which some 44 are new to science. It is satis- 

 factory to learn that this work is now being printed, and will soon 

 appear among the scientific memoirs issued by the Swedish Geolo- 

 gical Survey. 



At the time of his death, Linnarsson was busied on collecting 

 materials for a monograph of the Lower Palaeozoic strata of Ostro- 



