2 9 
latter is a view of the south end of the quarry, the dark shales 
being towards the downhill shle The inner face of the quarry 
is an oxidised clay and kaolin which is used equally with the 
shale in the making of bricks, the various kinds of material 
being mixed together in the pugging mill. At the south end the 
material is kaolin with bunches of quartz veins in it up to 18 inches 
diameter. The quartz is somewhat cavernous and chalcedonic. 
The surface of the kaolin in dry seasons shows an efflorescence 
in places which is both magnesian and saline. On the western 
margin of the quarry, at the head of the tramline, there 
is a diorite dyke passing in a north-westerly and south- 
easterly direction, some large loose boulders lying on the surface 
adjacent represent the weathering of the dyke, while the excava- 
tion shows the solid material. No actual intersection of the shales 
of the quartz 's to be seen at present, but it would not be improb- 
able to occur, for quartz veins penetrate the sandstone at Donny- 
brook about ioo miles to the south, and diorite dykes intersect 
the quartzites or altered sandstones near Moora, about ioo miles 
to the north. The kaolin spur here is probably a decomposed 
spur of the granite range. The shale is contorted in places and 
has, moreover, an incipient cleavage which is perpendicular and 
thus intersects the bedding plane at an oblique angle (see plate 
No. i, Fig. 2). 
The age of the strata above described has not yet been de- 
termined, and they may or may not be of the carboniferous period. 
The material is favorable for the pieservation of organic remains 
such as graptolites ; these range up to about one inch in length, 
and it is to be hoped that members of the Society will keep a 
watchful look-out for any such traces, as the quarry work proceeds. 
• W. D. Campbell. 
BOYA, 1 8th SEPTEMBER, 1909. 
Boya is situated on the Chidlows’ Well line, some twenty 
miles from Perth. It is a good place for work, being little fre- 
quented and with most picturesque surroundings. There is here 
plenty of material for all branches of Natural History. A quarry 
in which a dyke of dio”ite is exposed was examined. This was 
pointed out by Mr. Simpson and its formation explained. 
The botanical collections were good, including some tine 
specimens of an Orchid (Prasophyllum elatum), which in this 
neighborhood can be obtained up to 2 \ feet in height. 
F. Tratman. 
Boya Entomological Notes. — Entomology was very 
poorly represented, as the whole of the giound covered by 
the excursionists had been very severely swept by bush ti.es 
during the last summer, so that while 'we walked land 
