432 THE CANADIAN NATURALIST. [Vol. viii. 



and the middle apatite, whose greatest width is one foot. The 

 hornblende is often full of brown scales of mica, which occurs 

 also in larger quantity. Sometimes the entire width of the vein 

 is occupied alone by apatite or alone by hornblende. 



On Ravneberg occur three groups of veins. The vertical 

 gangstock of the central group, whose veins are all connected 

 with one another, consists of a coarsely crystalline hornblende 

 and mica ; both being mixed with lumps of apatite and green 

 enstatite like that from Oedegarden. The other veins of this 

 group are regular and continuous, rarely one foot thick ; one 

 dips slightly towards the ridge, the others are vertical. They 

 consist almost exclusively of reddish or greenish apatite, on both 

 sides usually separated by a thin crust of green enstatite from 

 the country-rock. The green enstatite was also found in larger 

 crystals, sometimes surrounded by apatite, but usually jutting 

 out from the saalband towards it. Quartz was also sparingly 

 observed. 



On the cape jutting into the Soendeloevsfjord there is a group 

 of very pure veins of apatite ; only on its saalbander do horn- 

 blende, mica and enstatite occur. The apatite is usually of 

 clear colour, white or greenish, but brick-red where in contact 

 with the crystals of hornblende (possibly caused by its iron-com- 

 pounds ?). 



At a greater elevation there occurs yet a third group of veins, 

 very similar to the preceding ones. The declivity is so precipi- 

 tous that the quarries can be reached only by ladders. 



What we observed on a small scale at Hiaseu is displayed at 

 Regardsheien in larger and bolder characters. The principal 

 rock of this deposit is, as already mentioned, a common dark 

 gabbro (with violet twin-striped labradorite). But in the im- 

 mediate neighbourhood of the veins we do not meet with this 

 dark gabbro, but with the above-mentioned " spotted gabbro." 

 This rock surrounds on both sides, as a zone of varying width, 

 not only the larger veins, but also their smallest stringers and 

 bifurcations, always exactly following their contour. But this 

 constant relation is accompanied by certain irregularities. Some- 

 times the zone is broader on one side of the vein than on the 

 other. In the case of one of the largest veins, which sends out 

 so many off-shoots as to form an enclosing network, wherever 

 this is very dense, the following observation may be made : the 

 "spotted gabbro," which usually surrounds every branch and 



