Dr. H. Woodward—Turrilepas in Canada. 271 
fish scales, teeth, coprolites, and spines, Cythere, Naiadites, Spirorbis. 
—2 feet. 
“13. Dark-bluish-grey, flaggy, concretionary, calcareous rock, 
with the same fossils.—2 ft. 6 inches.” There follow (14-29) other 
shales and shaley beds, more or less bituminous. At p. 71.H it is 
stated—'The black shales are those from which an interesting 
collection of fossils was made by Mr. Foord, of the Geological 
Survey, in the summer of 1881. In this collection the following 
forms have been determined by Mr. Whiteaves :—Naiadites (Anthra- 
coptera) carbonaria, Dawson; N. (Anthracomya) elongata, Dawson ; 
Entomostraca; Rhizodus lancifer, Newberry (scales); Cclacanthus 
(jugular plates) ; scales of two genera of Ganoid Fishes; also jaws 
and teeth of Fishes undetermined.” 
VIII.—On tue Discovery or TurRILEPAS IN THE Utica FORMATION 
(Orpovicran) oF Orrawa, CaNnaDa. 
By Henry Woopwarp, LL.D., F.R.S., F.G.S. 
R. AMTS interesting discovery has already been announced in 
a letter addressed to Mr. A. H. Foord, F.G.S., published in 
this Magazine (October, 1888). Mr. Ami now supplies a “Note” 
on the precise geological position of the beds in which the Turrilepas 
was found. Want of space, however, precludes us from giving the 
whole of his detailed observations, which are accompanied by 
a sketch section, here reproduced :— 
The following is a summary of Mr. 
Ami’s “ Note.” 
The Turrilepas was found in a band - 
of bituminous limestone cropping out on 
the right bank of the Rideau River, at 
the Rifle Range, near Ottawa. The pre- 
cise position of the beds (Lower Utica = 
about the lower part of the Bala Series),’ 
was ascertained by means of their fossil 
contents, which include an interesting 
Brachiopod—Siphonotreta Scotica, identi- 
fied and named by the late Dr. T. David- 
son, F.R.S. 
The calcareous and shaly measures 
characterizing the Lower Utica in this 
district, as exposed on the Rideau River, 
have a south-by-west dip of about 4°, and 
exhibit a portion of the south-western 
limb of a low, denuded anticlinal, which, 
however, affects the physical aspect of the 
country to a very small extent. 
The accompanying sketch is a diagram para aeaese= 
section of the rocks cropping out at the pisoram-section of rocks at 
Rifle Range rapids. The depth of section Rifle Range near Ottawa. 
is about 22 feet. 
1 Mr. Ami regards them as equivalent to the Llandeilo of Craighead, Ayrshire. 
eT LeBel etl spend Lael ae yaar 
