272 Dr. H. Woodward—Turrilepas in Canada. 
(pp.) There are resting unconformably upon the Utica beds 
between 1 and 2 feet of Post-Tertiary sands and gravels, débris 
from the glacial clays or “till,” the “Leda clay,” and overlying 
sands of the Rideau Valley, a valley of denudation. 
(a.) These upper measures consist of thin-bedded, soft, at times 
hardened, black or dark brown, bituminous shales, holding crinoidal 
fragments associated with Lingula progne, Orthis testudinaria, 
Trocholites ammonius, Endoceras proteiforme, Triarthrus Becki, 
Asaphus Canadensis, etc. 
(0.) Thin Conularia-band, consisting of dark grey impure lime- 
stone, with Orthis testudinaria, Leptena sericea, Conularia Trenton- 
ensis, etc. 
(c.) Zone of Siphonotreta scotiea, Davidson. Band of black 
bituminous limestone, often shaly in character, and containing 
numerous fossils, including Lingula elongata, Discina Pelopea, Lep- 
tena sericea, Zygospira Headi, Conularia Trentonensis, Calymene 
senaria, Beyrichia oculifera, and Turrilepas Canadensis. 
(d, e, f, g-) Thin bands of black, grey, or dark brown calcareous — 
and bituminous shales, highly fossiliferous, except (g), which is 
“apparently destitute of fossils.” 
(h.) Light yellowish, grey weathering, argillaceous limestone 
bands, with shaly partings between the divisional planes of strati- 
fication, distinctly nodular in character and structure, disintegrating 
rapidly under atmospheric influence. Fossils :—Monticuliporide, 
Brachiopoda, Orthocerata, Bucania eapansa. 5 feet 5 inches. 
(i, k, l.) Thin bands of bituminous limestones and shales, from 
3 to 10 inches in thickness, the last (1) holding Orthis testudinaria, 
Leptena sericea, Calymene senaria. 
(m.) Dark grey, bituminous, crinoidal limestone band with Lep- 
tana sericea, etc. This stratum dips north and south, being on the 
axis of the anticlinal referred to above. Thickness varying from 
4 to 6 inches. 
(n.) Thin shaly parting, with Asaphus Canadensis. — 
(o.) Hard, compact, light-weathering, dark grey limestone band, 
holding Orthis testudinaria, Leptena sericea, Calymene senaria, Asa- 
phus Canadensis, Conularia Trentonensis. 
(p.) Compact, dark grey, impure limestone, bituminous and 
fossiliferous, holding Asaphus, sp. indt., crinoidal fragments, etc., 
preserved in a light, yellowish-brown, ferruginous matrix. Thick- 
ness, 8 inches. 
At a meeting of the Geological Society of London on June 7th, 
1865, I described a new genus of Cirripedia from the Wenlock 
Limestone and Shale of Dudley, which I named Turrilepas (see 
Quart. Journ. Geol. Soc. vol. xxi. pp. 486-489, pl. xiv. figs. la—I). 
This Cirripede (or part of a Cirripede) had as many as four rows 
of asymmetrical plates, with more than eight plates in each row: 
the surface of each plate had a uniform sculpturing of fine, slightly 
waving, delicate, raised lines similar to those seen on the opercular 
valves of Balanus or of Pollicipes. As many as three or four different 
