Introduction. 



In the summer of 1897 1 visited South Greenland in order 

 to make mineralogical investigations , with which I had been 

 charged by the Commission for conducting the geo- 

 logical and geographical exploration of Greenland 

 ("Commissionen for Ledelsen af geologiske og geografiske Under- 

 søgelser i Grønland»). An account of this visit was published 

 in «Meddelelser om Grønland» ^). 



As far as hitherto known , the rocks of South Greenland, 

 taken as a whole, are gneiss and granite of uniform character 

 and poor in minerals. Only the syenite regions adjoining the 

 Firths of Tunugdliarfik and Kangerdluarsuk in the vicinity of 

 Julianehaab form an exception in this respect, being very rich 

 in rare minerals. These regions formed the principal objects 

 of my investigations during my visit to the country , and from 

 thence I brought home rich collections of minerals , several 

 of them new to science. 



Among the numerous mineral occurrences in these syenite 

 regions, that of Nar sar suk holds the first place with regard 

 both to the number and the nature of the minerals. A descrip- 

 tion of the minerals collected on Narsarsuk is given in the 

 following pages. First, however, a few words may be said about 

 the locality. 



1) Vol. XIV, pages 221—262. 



