The above-mentioned kinds of rocks are of great interest 

 on account of the rhombic pyroxene found in them, as the 

 presence of this mineral often indicates the probability of the 

 occurrence of rocks containing still more rarely associated 

 ingredients. The moment was thus eagerly awaited when a 

 more considerable material could be procured from this locality, 

 in order to ascertain how widely distributed these peculiar kinds 

 of rocks were in the district in question. 



Only once since has a specimen of rock from the above- 

 mentioned district been examined, viz. a brown gneiss from 

 Angmagsalik brought by E. Bay in 1892 and very briefly 

 described by him M as consisting of felspar, quartz, broncite 

 and biotite. Here again there is the same peculiarity, but 

 thai is easily explained by the fact that the specimen is from 

 the very same locality as those collected during Norden- 

 ski ö Id's visit. 



Under these circumstances I was very much interested in 

 getting the material collected by Mr. Kruuse for examination. 

 It is not considerable, but it contains specimens from a great 

 many localities about Angmagsalik, and also numerous small 

 specimens from different stations along the coast between Ang- 

 magsalik and lat. 67° 22' N. 



The main result of the examination was, however, negative, 

 as none of the specimens which I have had for examination 

 exhibited any unusual mineralogicai combination, nor more 

 particularly, did I find rhombic pyroxene in any of the speci- 

 mens '). The rock in question, consequently, does not seem 

 to be widely distributed even in the district of Angmagsalik, 

 or at any rate it does not appear to be so common on this 

 coast as might be expected, judging from its frequent occur- 

 rence in the specimens previously examined. 



') Meddelelser om Grønland, H. 19, p. 176. 



^) With the possible exception of the below-mentioned amphibolite-pikiite 

 from «the gravel -pil". 



