142 Mineralogy and Geology of a part of Nova Scotia. 
angles. The crystals are also so modified, as to assume the 
form of the dodecahedron composed of two scalene six sided 
pyramids, applied base to base. They are greatly elongated, 
and grouped in delicate stellae, occupying the cavities of the 
amygdaloid. 
Delicate prismatic crystals, but not of sufficient size to de- 
termine their form, resembling the Brewsterite from Scot- 
land, occur scattered through the cavities of the trap tuff and 
associated with perfect and distinct crystals of analcime, con- 
stituting interesting specimens. 
, The last of the minerals which we shall mention as occur- 
ring at this locality is silicoius sinter. This mineral is usually 
One or two geodes of this substance were found in breccia, 
which, on being broken, presented internally a bright coating 
of amethystine sinter with numerous crystals of wine yellow 
chabasie implanted in, and beautifully contrasted with it. 
_ The next places to be noticed along the northern shore 
of the Basin of Mines are the Five Islands, and an eminence 
lect many specimens worthy of his visit. ‘The remaining two 
are composed of sandstone a iting 1 
some places, the passage of these rocks into a reddish amyg- 
daloid, vesicular, and zeolitic. In other places, an intermix- 
