44(5 J- P- J- Ravs. 



have perhaps been quite removed by an earlier land-ice with greater 

 extension that the present. 



d. Neocomian. 



1. In addition to the boulders of sandstone just mentioned, 

 boulders of quite a different character were also found in the district 

 round Dan marks Havn, namely, calcareous concretions. These 

 boulders seem to be comparatively rare, only 4 being found. They 

 consist of a coal-black , clayey limestone with few flakes of mica. 

 Their origin is unknown; it is possible perhaps, that they may have 

 come from some sediments, which occur farther north at .l0kel Bay 

 and consist mainly of black, slaty clay; but this is very doubtful, as 

 such concretions — so far as I am aware — have not been found 

 in these sediments. One of the concretions contained only an Am- 

 monite, Lijtoceras polare n. sp., whilst two others were very rich in 

 fossils, which however could only be prepared with great difficulty. 

 The most common forms are Garnieria pnsilla n. sp. and two species 

 of Aporrhais. From the occurrence of a representative of the genus 



O O CD X : :; p;o-'o c;^'/;.;'.;.';:\'v:-X:' : ; ; ' 

 Gneiss Ac Gc Sa 



Fig. 1. Diagrammatic sketch of "Aucellabjerget" (H. Jhuhb). Ac. = "Aucella-conglomerate". 

 Gc. = "Gneiss-conglomerate". Sa. = Sandstone. 



Garnieria we may perhaps conclude, that these concretions come from 

 deposits belonging to the Neocomian. Some young specimens of an 

 Aucella found in these concretions seem to point in the same direc- 

 tion. These cannot be determined as to species, it is true, but so 

 much seems certain, that they belong lo a Neocomian type. 



2. "Aucellabjerget". This locality lies at the south end of 

 the southernmost of the sandstone regions on the east side of Store 

 Koldewey Island. On a short stretch here Jarner found conglomerates 

 of a very characteristic appearance. Both towards the north and the 

 south the boundary of the conglomerates was fairly indistinct. 

 Farthest to the north (thus nearest the sandstone) the conglomerate 

 consisted of fragments of gneiss, between which a reddish limestone 

 has been deposited. Further to the south the gneiss fragments be- 

 came larger, from the size of a list to thai of the head; their inter- 

 spaces were lilled with a reddish sandstone , which macroscopically 



