bi otite-gneiss with numerous stripes of red orthoclase ; a 

 dark-green amphibolite ; a micaceous gneiss with large «eyes» 

 of an impure garnet; a white pegmatitic rock rich in biotite; and 

 a garnet-gnei ss where dark and Ught layers alternate; the 

 former containing much hornblende, and the latter consisting 

 exclusively of garnet and quartz. There also occurs another 

 peculiar rock consisting largely of garnet, which is, however, 

 completely decayed and coloured by oxide of iron and therefore 

 indeterminable as is also the case with several other specimens 

 from this locaUty. On the whole it may be said that the rock 

 consists of biotite-gneisses very rich in hornblende and garnet, 

 the latter sometimes supplanting the other mineral ingredients. 

 These rocks when examined microscopically do not exhibit 

 any specially peculiar characters. The first-mentioned variety 

 consists chiefly of orthoclase besides microcline , quartz and 

 biotite. The quartz shows «myrmekitic intergrow^hs» ^) in ortho- 

 clase, mostly in the smaller grains, but also here and there at 

 the edges of the larger individuals. The rock has distinctly been 

 subject to strong pressure, but the quartz hardly shows any 

 undulating extinction and its present structure is undoubtedly 

 due to re-crystalhzation. 



' The amphiboHtic variety consists chiefly of a compact, 

 somewhat bluish-green hornblende , besides some plagioclase 

 and garnet. The latter is, as in all the other varieties, isotropic, 

 and though it usually contains numerous interpositions of quartz, 

 the specimen in question is singularly pure. There occurs, 

 moreover, some iron-ore in skeleton-like crystals grown together 

 with felspar. 



Another specimen contains besides the above-mentioned 

 minerals н great abundance of quartz interposed in garnet, and 

 also a very strongly refractive mineral in numerous greyish- 



') Term introduced b> J. J. Seder h ol m , Bull, de la (Uimm. Géologique 

 de Im KliilMiide Nr. 6, Helsingfors 189». 



