330 T. G. TAYLOR AND D. MAWSON. 
No. 2. Locality Mount Jellore, 200 yards from 
top on west side. 
Texture—Pilotaxitic. 
Fabric—Hypautomorphic-granular. Rock consists of a 
groundmass of small felspars and small fibrous aggre- 
gates of green soda-augite (aegirine). Larger felspars 
of lath shaped habit are scattered irregularly through 
the mass, together with aegirines which are as a rule 
somewhat smaller than the former. 
Minerals present (approximate area)— 
Felspar (orthoclase and sanidine) ... van LORE 
Aegirine ... sr — ee ms oe OH 
Magnetite 
Arfvedsonite (accessory). 
Felspar—The larger crystals are usually broken and 
angular. Many are singly twinned and comparatively long 
and narrow. These are of variety sanidine. The small 
felspars of the groundmass are of granular habit with ill- 
defined edges. 
Aegirine—In long ragged laths of green-brown colour. 
Arfvedsonite—A slate-brown mineral visible with high 
power in the groundmass in some quantity, is referable to 
this variety of hornblende. 
Magnetite in small grains is present. 
Order of Consolidation. 
Aegirine 
Felspar magnetite 
: aegirine and arfvedsonite 
felspar 
Name.—tThe rock is evidently a trachyte. From com- 
parative abundance of aegirine it may be termed AEGIRINE 
TRACHYTE. It may be mentioned that this rock was stained, 
after acting on section by hydrochloric acid, in order to 
