SEPTEMBER 29, 1899. ] 
a single series. Professor Meek, in describing fossils 
from limestones occurring in the mountains south of 
the boundary line, which, from the general facies, he 
believed to be Carboniferous, mentions the fact that 
the forms, without exception, belong to genera which 
are common both to that formation and the De- 
yvonian, and of which a small number are represented 
in the Silurian.’’ * 
In 1881, 1883 and 1884 Dr. Dawson was 
engaged in an examination of the geolog- 
ical structure of parts of the Rocky Moun- 
tains in Alberta between Lat. 49° and Lat. 
51° 30’, the results of which were published 
in the ‘Annual Report of the Geological 
Survey of Canada’ for 1885 (Vol. I., New 
Series). This report contains preliminary 
lists of a few supposed Devonian fossils, 
from the limestones on the summit of the 
North Kootanie Pass, on Crow Nest Lake, 
and from the lowest beds exposed at the 
west end of the cafion on the Cafion branch 
of the Elbow River. 
Subsequently Mr. R. G. McConnell made 
a geological survey of the Rocky Mountains 
between the Canadian Pacific Railway and 
the North Saskatchewan in 1885, and a 
more detailed exploration than had yet 
been made, of the geology of those in the 
more immediate neighborhood of that rail- 
way,in1886. He published in the ‘Annual 
Report of the Geological Survey of Canada’ 
for 1886 a geological section across the 
Rocky Mountains in the vicinity of the 
Canadian Pacific Railway, with a diagram 
showing the formations represented in the 
sections to the west of the Castle Mountain 
Range, and another of those represented 
in sections to the east of that range. In 
the latter only four geological systems or 
formations are recognized, namely, the Cam- 
brian, which Mr. McConnell calls also the 
‘Castle Mountain Group’; the Devonian, 
which he designates also as the ‘ Inter- 
mediate Limestone’; the Devono-Carbo- 
*Report on the Geology and Resources of the 
Region in the Vicinity of the Forty-ninth Parallel,’ 
eto., 1875, p. 71. 
SCIENCE. 
435 
niferous, which he calls the ‘ Banff Lime- 
stone’; and the Cretaceous. In the text 
itis stated that the Intermediate Limestone 
is “ mainly composed of a great series of 
brownish dolomitic limestones and has a 
thickness of about 1500 feet.”” Its fossils 
are ‘‘usually badly preserved and consist 
mainly of almost structureless corals.” 
The few that were collected, it may be 
added, have not yet been determined and 
indeed are scarcely determinable. Accord- 
ing to Mr. McConnell, the Banff Limestone 
is the “principal constituent of all the 
longitudinal ranges east of Castle Moun- 
tain.’’ It ‘has a total thickness of about 
5,100 feet and is divisible into a lower and 
upper limestone and into lower and upper 
shales.’”’ Its fossils are better preserved 
than those of the Intermediate Limestone, 
and fairly large and representative collec- 
tions of the former were made. 
These collections have not yet been at all 
exhaustively studied, but most of the spe- 
cies represented in them are apparently of 
Carboniferous age. Among those collected 
in 1886 are two or three small species of 
Productus; a large Syringothyris; a Pugnaz 
closely allied to if not identical with P. 
Rockymontana, Marcou ; a Hustedia like H. 
Mormoni (Marcou); and two well-marked 
pygidia of Pretus peroccidens, Hall and 
Whitfield. The specimens from the black 
fissile shales of the Bow River, collected by 
Mr. McConnell in 1885, that were pro- 
visionally referred to the Devonian genus 
Clymenia on page 18 D of his report, do not 
show clear indications of either septa or 
siphuncle, and may, therefore, be casts of a 
discoidal gasteropod. On the other hand, 
in 1885 Mr. McConnell obtained a few 
specimens, that are unquestionably refer- 
able to Atrypa reticularis, from the Rocky 
Mountains at the Pipestone Pass Falls, and 
from the first range on the North Saskat- 
chewan. It was from the mountains at 
the source of the North Saskatchewan that 
