( 324 ) 



Only those pieces are consideretl which, as lie says, are so compact 

 as to resemble serpentine. 



An erratic-block of the same kind has perhaps also been found 

 in the eastern part of the German diluvinm. Gagel ^) at least speaks 

 of a greenish, hard piece of limestone, with yellow spots here and 

 there in conseqnence of corrosion, in which little glauconite-grains 

 occnr rather scattered. He does not tell us whether it is compact. 



Though in all these pieces, except that of Steussloff, Orthis 

 Christianiae is declared to be present, and though petrographically 

 they seem more or less to resemble my erratic-block, — 1 dare not 

 take it for granted that they are closely related to it. 



It must further be traced where corresponding limestone is still 

 found as firm rock. This is certainly the case at Ottenby on the 

 ^vestern coast of the southernmost part of Geland. Last summer I 

 conld convince myself of this. Ceratopyge-lime is there not only of 

 the same petrographical nature (in most cases at least), but is also 

 rich in fossils. Holm informs us that towards the midst of the island 

 this stratum is less developed; its colour is more reddish here, and 

 it is less rich in fossils, so that as a rule only Orthis Christianiae 

 is met with. In the northern i)art of Oeland it is altogether absent, 

 according to Holm. 



In Schonen, Cerato])yge-limc has been found only near Fjlgelsrlng, 

 as far as one knows for certain. This kind, however, is more bluish- 

 coloured, which I can observe in a piece I received from Prof. MoBEiUi. 

 Corresponding limestone may also occur in West-Gotland, on Kinne- 

 kulle and Hunneberg. According to Linnausson ") the Kinnekulle-stone 

 is a hard, light-grey, mostly bluish and greenish limestone, often 

 with numerous small, blackish-green glaucouite-grains. He says that 

 the Hunneberg limestone is little or not at all bituminous, now com- 

 pact, now crystalline, either black or grey, and frequently containing 

 pyrite. So there is a possibility, to be sure, that such-like limestone 

 is found there; but without any material for comparison nothing 

 can be said with certainty. 



Ceratopyge-lime, which, as is generally known, is not met with 

 in the Russian Baltic-seaprovinces, moreover still occurs as firm rock 

 in the south of Norway and in the en^'irons of Christiania and 

 Mjösen. Holm ') declares it to be occasionally so much like that of 

 Ottenby in Oeland, that he is unable to distinguish one kind from 



1) Gagel, loc. cit. p. 9. lb. 



2) LiNNARssoN, loc. cit. p. 30, 56. 

 S) Holm, loc. cit. 



