201 



The age of the Jurassic strata of Mount Nathorst seems to 

 be intermediate between the Upper Bajocian and Lower 

 Bathonian. 



The following were collected by Hartz in Vardeklöft between 

 August 11*^ and 19"': — 



a) A block of coarse-grained sandstone, found 

 450 feet (140 metres) above sea-level, contained: — 



Pecten sp. [an. Steivartianus, Ldndgr.), one fragment. 



Pecten sp. cf. Binki, Lündgr., one cast. 

 Pecten Stewartianus and Binki occur in the Callovian 

 of Cape Stewart. This piece of sandstone is probably 

 derived from a continuation of these beds. 



b) Blocks of dark-coloured calcareous sand- 

 stone, found 480—640 feet (150—200 metres) above 

 sea-level, contained: — 



Bhynchonella sp.^ one fragment. 



Bhynchonella sp., one fragment. 



Pecten sp. cf. Johnstrupi, Lündgr., one fragment. 



Ästarte Bayi, Lündgr., one specimen. 



Astarte Hartzi, Ldndgr., two casts. 



Lamellibranchiata gen. et sp. ind., two specimens. 

 The fossils that are suitable for purposes of determina- 

 tion all occur in the Callovian beds of Cape Stewart. 

 The dark-coloured calcareous sandstone blocks are ap- 

 parently derived from a continuation of these beds. 



c) Concretions in a very micaceous clay-shale, 

 the so-called «Ammonite-bed», found 1750—1850 

 feet (550 — 580 metres) above sea-level, yielded: 



Ichthyosaurus {Ophthalmosaurus) sp. one vertebra. 

 Gastropoda gen. et sp. ind., one specimen. 

 Macrocephalites Ishmce, Keys. sp. ; eight specimens. 

 Macrocephalites sp. cf. compressus , Qdenst. , one 

 fragment of a cast. 



