. Bulletin of the Bureau of Fisheries. Bull. U. S. B, F. THK GOLDEN TKOITT. 11 levtl meadows, where the watei- Hows gently, this ])(>rtioii of tlie stream is made upof a succession of i-apids and small cascades, none, liowcner, constituting- a barrierto the ascent of fishes. The total fall from the headwaters to the point where thestream turns west is between l,t)00 and 2,000 feet. The bend to the westward is made just after the stream enters an east-and-westancient trough or valley which Professor Lawson calls Toowa Valley, just belowthe most eastern of the series of small volcanoes


. Bulletin of the Bureau of Fisheries. Bull. U. S. B, F. THK GOLDEN TKOITT. 11 levtl meadows, where the watei- Hows gently, this ])(>rtioii of tlie stream is made upof a succession of i-apids and small cascades, none, liowcner, constituting- a barrierto the ascent of fishes. The total fall from the headwaters to the point where thestream turns west is between l,t)00 and 2,000 feet. The bend to the westward is made just after the stream enters an east-and-westancient trough or valley which Professor Lawson calls Toowa Valley, just belowthe most eastern of the series of small volcanoes or cinder cones which give name tothe creek, and at a place known as the tunnel. The elevation of the creelv bed atthis point is about 8,600 feet. The floor of Kern Canyon at the mouth of VolcanoCreek is 6,300 feet. The drop made by this portion of the creek is therefore about2,300 feet. (PI. x, fig. 28). As already stated, the descent made by the creek above the tunnel is withoutan} considerable sheer falls. That portion below the tunnel is markedly differe


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