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A N:o 1) Igneous Rocks of Sviatoy Noss in Transbaikalia. Al 
quartz only in the form of epidote-quartz-myrmekite ?). 
The structure is aplitic, the anhedral grains having ragged 
outlines. The mineral constituents, named in the order of 
their relative abundance, are: microcline, sodic plagioclase 
(Abg& 95)» quartz, epidote-myrmekite, calcite, aegirite- 
augite, titanite, apatite. 
Aeqgirite-augite-granite. 
Among the light-coloured fine-grained rocks exposed at 
point 74 A and 75 A and occurring copiously in the shore- 
drift in this region are also such containing much quartz. 
Being fine-grained and having colourless feldspar of the 
same tint as the quartz these granitic vVarietes were not 
distinguished from the rocks just described during the field-' 
work, and were noted as syenite. As I thus overlooked the 
granite, its mode of occurrence also escaped attention. It 
seems, however, that it is connected with the syenites by 
gradual transition, as intermediate types are represented 
among the specimens collected from this tract. At all events 
the granite is genetically related to the syenites, as appears 
from its characters. 
For chemical investigation was chosen a specimen col- 
lected from the shore-drift near point 74 A. It is a whitish, 
- millimeter-grained rock mingled with dark green spots which 
are crystals of pyroxene. The chemical analysis, executed 
by the writer, gave the following result. 
2) A microphotograph of the rock under consideration illustrating this 
intergrowth is reproduced in Sederholm'”s paper on the Synantetic mine- 
rals quoted above. 
