ELLS GRAHAM ISLAND 33 B

Cytheris (Caryatis) subtrigonia, Whiteaves.
Thetis affinis, Whiteaves.

Trigonia diversicostata, Whiteaves.
Inoceramus concentricus, Parkinson.
Perisphinctes skidegatensis, Whiteaves.

From the area between Robertson camp and the east side of Yakoun
lake the following were obtained by Mr. Robertson:—

Hoplites yakounensis, n, sp.

Thracia semiplanata, Whiteaves.

Yakoun lake has an elevation, by aneroid, of 210 feet above sea-level.
The country to the north, through which the Yakoun river flows to Masset
inlet, is low, but is bounded by high hills a short distance west of the lake
and stream. Occasional ledges of sandstone outcrop along the river, and at a
point about midway between the lake and the inlet the voleanics approach in
a large spur from the main mass. The contact of the sedimentary rocks with
the igneous is, therefore, not far distant from the west bank of the stream.

On the inland bays or lakes at the head of Masset inlet, the igneous
rocks are everywhere exposed, either in ledges or in masses along the
beach, and no trace of sedimentary rocks is seen in this direction south
of the junction of the Nadu river. The valley of the river itself is.
densely wooded and almost impenetrable to one on foot. The only
indication of sedimentary rocks in the area west of the river is a small
outcrop of Tertiary shales with traces of lignite, recorded by Dr. Dawson
as occurring on the Mamin river, a tributary of Tsooskatli lake, and al-
ready referred to.

In the area between the Skidegate shore and Yakoun lake coal
has been found in at least three places, besides the unimportant oceur-
rences mentioned above. A considerable extent of country has been
blocked out into townships and lots by the Government of British Columbia,,
so that these outcrops may be definitely located. Of these coals, the most.
northerly is that known as Wilson camp on lot 36, township IX; the sec-
ond large deposit is on lot 20, township V, named Robertson Camp, after
the discoverer of the coal field, and the outcrop of anthracite on a small
brook on lot 17, township V; the outcrop of the last being on the strike

of the Robertson seam, though the connexion cannot be traced across the

intervening country.

The area in which these several outcrops are located is rugged and hilly.
It. is covered with a heavy forest growth and is intersected by several
small streams that flow northward into the east branch of the Yakoun
river. The surface is difficult to traverse owing to its gener-

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