41 



Öfversigt af Kongl. Vetenskaps-Akademiens Förhandlingar 1899. N:o 2. 



Stockholm. 



On a species' of Tetradium from Beeren Eiland, 

 By G. Lindström. 



Communicated February S^^ 1899. 



When on his Arctic Expedition last year Professor A. G. 

 Nathorst visited Beeren Eiland he there detected strata of a 

 black, härd limestone on the southwest side of the Island. They 

 are situated on the southeast or eastsoutheast side of Elias lake and 

 they had been, according to Prof. Nathorst, raised and abraded 

 before the deposition of the contiguous Upper Devonian sand- 

 stone. Consequently he concluded that they must be of a con- 

 siderably higher age than this sandstone and possibly belong to 

 the Silurian formation. 



The short stay at the spöt mentioned did not allow to make 

 a more comprehensive coUection and only a few samples could 

 be brought home. As these consisted chiefly of Orthoceratites 

 he thought that he could refer thera to the Lower Silurian se- 

 ries. The Silurian character of these fossils, which Prof. Na- 

 thorst gave över to me for investigation, was at first by no 

 means evident. The chief mäss consists of some twenty speci- 

 mens of an Orthoceratite belonging to the genus Actinoceras and 

 besides of some faint traces of a Strophomenoid brachiopod and 



