330 E. M. KINDLE 
to 2,000! feet. A thick series of shales and sandstones, with some 
conglomerates and calcareous lenses, underlies it.2 Its nearest faunal 
relationship, like that of the Alaskan Upper Carboniferous limestone, 
is with the European and Asiatic province. ‘The McCloud limestone 
has generally been regarded of Upper Carboniferous age. By 
Tschernyschew it is correlated with the Upper Carboniferous or 
Uralian of Russia.4 
It is very probable that representatives of the Upper Carboniferous 
limestones of Pybus Bay and Kuiu Island will be found in the Cache 
CreekS series of British Columbia. The data thus far published on 
these rocks show only that a considerable thickness of Carboniferous 
limestones® is present in British Columbia. 
SUMMARY 
The Silurian is represented by a limestone series probably 3,000 
feet thick, holding faunas whose nearest equivalents in eastern 
America are the Niagaran and Guelph faunas. A series of beds 
aggregating several thousand feet in thickness precedes the beds 
known to be of Silurian age, and represents either Silurian or earlier 
horizons. 
Lower, Middle, and Upper Devonian faunas are present in south- 
eastern Alaska, the first resting upon beds of igneous origin. The 
total thickness of the Devonian is unknown. In the northern part 
of the region the Upper Devonian appears to be represented in part 
by beds of igneous origin. A limestone series about 470 feet in 
thickness forms the lowest lithologic series of the Devonian. S pirijer 
disjunctus and Productella hallana Wal. characterize the Upper Devo- 
nian fauna. ‘Two species of Hercynella are the most abundant forms 
in the basal Devonian. 
Limestones resembling somewhat the Mississippian in their fauna 
represent the Lower Carboniferous. ‘These have a thickness of about 
t Journal of Geology, Vol. II, p. 600. 2 [bid. 
3 Paleontology of California, Vol. I, pp. 326, 327; Journal of Geology, Vol. II 
(1894), pp- 600, 601. 
4 American Journal of Science, Fourth Series, Vol. XXII (1906), p. 39; Mé- 
moire du Comité géologique, Vol. XVI (1902 [1903]), pp. 433-5I- 
5 Bulletin of the Geological Society of America, Vol. XII (1900), p. 70. 
6 Tbid., p. 71. 
