Notices of Memoirs — Br. G. Linnarsson — GraptoKte Schists. 279 



thinly laminated straiglit-cleaving scbist crowded with Graptolites, 

 which appear as thin shining films of iron-pyrites. It rests upon 

 the Brachiopod Schists, and is surmounted by a grey flag-like rock, 

 which has not hitherto yielded fossils, but possibly represents the 

 Hetiolites Schist. 



At the time the author described the sequence of the Silurian rocks 

 of Westrogothia some years ago,' a very small number of species 

 only had been detected at Kongslena. In the summer of 1876, in a 

 fresh visit to this locality, he was fortunately able to add greatly to 

 his former discoveries. In specific richness the Lobiferus Schist at 

 this spot now exceeds that of all other known Swedish localities. 

 The description of several forms which appear to be new is best 

 deferred till more and better material has been obtained ; and the 

 state of preservation of others which are already named does not 

 admit of their certain identification. The following list is therefore 

 far from complete. 



Graptolites from the Lobiferus Schist of Kongslena. 



Eastrites peregrinus, Barr. 

 Diplograpt. palmeus, Barr. 

 cjr. modestus, Lapw. 



Monograptus lobiferus, M'Coy. 



Sagittarius, His. 



Sandersoni, Lapw. 



Sedgwicki, Portlk. 



spiralis, Geinitz. 



triangulatus, Harkn. 



cometa, Geinitz. 



tamariscus, Nich. 



Climacogr. rectangularis, M'Coy. 



Schists with a similar fauna occur not only in Westrogothia, but 

 in many other districts in Sweden, as in Dalarne and Scania. 



In the island of Bornholm it is probable that the Lobiferus Schist is 

 paralleled by the lower portion of the graptolitiferous schists which 

 are denominated by Johnstrup ^ the Uppermost Graptolite Schists. 

 In Norway and the Eussian Baltic Provinces no precise equivalents 

 of the Lobiferus Schist are known. It is not improbable that beds of 

 the same age may exist there, but if so, they have so wholly different 

 a facies that it is impossible to compare them. Very different how- 

 ever is their correlation with the Silurian rocks of Britain. If we 

 examine a list of the fossils of tlie latter, we recognize almost all the 

 above-mentioned Graptolites. Notwithstanding this, however, it 

 was formerly impossible to parallel the Lobiferus Schist with any 

 special portion of the English succession as arranged by Murchison. 

 This was mainly owing to the circumstance that these Graptolites 

 had not been discovered in the districts whence Murchison drew the 

 types for his Silurian system. In other parts of the country, as in 

 the Coniston and Moffat Groups of the Lake District and the South 

 of Scotland, they have long been known ; and it has already been 

 shown by the author-^ that these include equivalents of the Upper 

 Graptolite Schists. But respecting these, and the other British 

 graptolitic deposits relatively older, we have always had very 



1 Linnarsson, Om Vestergotlands Cambriska och Siluriska aflagringar, K. Vet. 

 Akad. Hand., Bd. 8, Nr. 2, 1869. 



2 Johnstrup, Oversigt over palseozoiske Dannelser paa Bornholm, Forh. v. d. 

 Skandinav. Naturf. lite, sid 307. 



•^ See, for example, Linnarsson, " On the Vertical Range of Graptolites in Sweden," 

 Geol. Mag. Dec. IL Vol. III. 1876. 



