On Jurassic and Cretaceous fossils from North-East Greenland. 445 



Pecten Broenlmiili and Taiicredia Jarneii; holli оГ these species as 

 well as the other species determinable with a fair amount of certainty 

 are known from the northernmost sandstone region on Store Kolde- 

 wey. There can thus i)e no doubt, that the yellow and red sand- 

 stones on Hochstetter's Foreland and the gray sandstone farthest lo 

 the north on Store Koldewey belong to the same age. 



с Portlandian. 



hi the district roimd Danmarks Havn, esi)ecially in the pass (Vester- 

 dalen) which se[)arates the so-called Harefjæld from the remaining 

 part of the district, a number of sedimentary boulders were found 

 w^hich must have been brought down by the land-ice at a time, 

 when the latter had a much greater extension than it has now. 

 Where these boulders come from, is not known, as no trace what- 

 soever of fixed sedimentary masses has been found in the immediate 

 neighbourhood. They have presumably been brought down from the 

 north, as the ice seems to have come from this quarter, and it is 

 possible, that a portion of them has come from the sedimentary 

 deposits at .lokel Bay, which contain a quantity of badly preserved 

 fossil plants, whose age still remains undecided. The boulders proved 

 to be very different, both as regards their pétrographie character 

 and their fossil contents; we can distinguish between sandstones 

 containing mainly Portlandian fossils and calcareous concretions with 

 the remains of a Xeocom fauna. The former greatly resemble in 

 appearance the sandstone from the northernmost of the И sandstone 

 regions on Store Koldewey Island, as they are gray in colour and 

 contain a quantity of calcium-carbonate and numerous flakes of mica. 

 But the fauna is quite different. x\s the fauna list shows, Dentaliiim 

 nodulosum is the onlj^ species, which is common to these boulders 

 and the Alternans-strata on Store Koldewey. Of much more im- 

 portance, however, is the occurrence of Aiicella teniiistriata Lah. and 

 A. mosquensis v. Виси, the first of which goes from the Séquanian to 

 the Lower Portland, whilst the last-mentioned may well be considered 

 as a species characteristic of the Portland. In any case a portion of 

 these boulders must therefore be referred to the Portlandian. But 

 we also find here a by no means small number of specimens of an 

 Aiicella, which seems to be very nearly related to A. reticulata, a 

 species found on Spitzliergen in deposits, which according to Ром- 

 PECKJ must be referred to the Séquanian-Ivimmeridgian, thus in layers 

 which are of the same age as the Alternans-strata on Store Koldewey 

 and on Hochstetter's Foreland. It is probable, therefore, that a por- 

 tion of the boulders mentioned come from Alternans-strata, which 



