The marine Carboniferous of North-east Greenl. and its Brachiopod Fauna. 545 



Captain Koch on his return from the great sledging expedition. At 

 the former places the collections were made both from the solid 

 rock and of free-lying fragments; at the last-named place, of free- 

 lying boulders alone. 



Henrik Kröyer's Islets and the Mainland behind them. 



The rocks visible here are all dolomites of fairly crystalline 

 character. 



On the mainland there outcrops at a height of 30 metres above 

 the sea, a light gray yellow, strongly crystalline dolomite (N:o 201), 

 in which no fossils could be observed. Similar rocks occur on the 

 islets, one of them a pure, light-gray dolomite {N:o 172), without 

 fossils, found at 10 metres above the sea, and another a dark 

 gray, fairly porous and loose dolomite {N:o 173), at 3 metres above 

 sea-level. In this rock there were found traces of fossils, probably 

 belonging to a coral of a genus closely related to Amplexus; other 

 remains could not be at all clearly identified. In all these dolomites, 

 there exist small groups of dolomite crystals. 



On Henrik Kröyer's islets there were collected a number of 

 free-lying fossils {N:o 191), altogether 16 specimens of different kinds. 

 Among those must be noticed a silicified specimen of Productus timani- 

 cus Stuck., as the only brachiopod, preserved in a white dolomitic 

 limestone which is in very close agreement with the white limestone 

 from the Cape Jungersen section. In addition, there are a number 

 of fragments of a rugose coral, some with rock attached ; it is a light 

 gray limestone with a faint reddish tinge; is almost dense or very 

 finely crystalline in structure, and contains some scattered specimens 

 of Schwagerina princeps Moll.; it much resembles the fine-grained 

 limestones found free-lying at about 150 metres above the sea in 

 the Cape Jungersen section {N:os 100, 113 and 133). The other frag- 

 ments are, in general, more or less silicified, and are portions of 

 the rugose coral already mentioned, or also of trunks of a Syringopora. 



From the mainland behind Henrik Kröyer's islets there are 

 also a number of free-lying fossils and fragments of rock contain- 

 ing fossils {N:os 206 and 2U). 



N:o 206 are silicified fragments of a light rock containing the 

 same coral as that found on Henrik Kröyer's Islets, and some poor 

 examples of a Spirifer. 



N:o 214 embraces limestone fragments of various kinds con- 

 taining fossils of several different species. 



N:o 214 a is a trunk of a Syringopora, probably S. geniculata 

 Phill., preserved in a finely crystalline light gray yellow limestone. 



