OLAF HOLTEDAHL, [SEC. ARC. EXP. FRAM 



brown or greyish-yellow colour, and very often surprisingly heavy. South 

 Cape 1 is huilt up entirely of this brown limestone (se pi. II, fig. 2). In 

 its lower layers were found species of Mad urea, and Halysites, pointing 

 to middle Silurian." 2 



I have studied the material from South (lape, but 1 cannot add 

 very much to what has been written already. The fossils are found to he: 



Halysites catenukiria LIN. 



The form agrees very much with the variety gracilis HALL, in 

 having corallites of suhrectangular form without intervening tubules. 



Strophomena, sp. 



Two very imperfect outer moulds of ventral valves and a fragment 

 of a dorsal valve are found. Outline sub-hemicircular, the valves are 

 nearly flat in the posterior part, the ventral with slightly elevated beak, 

 strongly curved at the rounded margin with an extension in the middle. 

 The surface with fine radiating striae, every second, and in some in- 

 stances, every third one of which is stronger than the rest. They are 

 crossed by very faint concentric lines and by very delicate oblique 

 wrinkles. The form seems to come fairlv close to forms both from 



J 



the Trenton and the Richmond of North America, but any closer deter- 

 mination is, however, made impossible by the fragmentary character of 



the material. 



Mad are a sp. 



Only the under side of two specimens known. We have a large form 

 In-fore us, the diameter of an incomplete piece with about three volutions 

 being 1 1 cm. As the upper part of the shell is not known at all, no 

 determination can be made. 



Though the material is loo insufficient for any quite exact conclu- 

 >iou as to the age of tho.-,e fossils, I am inclined to believe that it is 

 another locality of the old Trenton-fauna, which is so well known from 

 a great many occurrences in the Arctic Archipelago. Specimens of Hall/- 

 xitrs are quite common in this hori/.on and the same may be said of 

 th- 



In the higher portion of this lime-tone series, "the brown-limestone 

 ol the capes" we find Silurian fossils. The best collection of fossils from 

 lhi> upper p;irt uas made on the ea>l coast of North Devon at "Baad- 



1 On Hie \vr-l -i.lf nl' Hi,, mouth of Hurhoiir jllavuc) Fjord. 

 ' Silurian in thr sense On)o\ ician-Siluriaii. 



