236 TJic America n Geologist. 
October, 1899 
exposed at the west end of the canon on the Canon branch of 
the Elbow river. 
Subsequently Mr. R. G. McConnell made a geological sur- 
vey of the Rocky mountains between the Canadian Pacific 
railway and the North Saskatchewan in 1885, and a more de- 
tailed exploration than had yet been made, of the geology of 
those in the more immediate neighborhood of that railway, in 
1886. He published, in the "Annual Report of the Geological 
Survey of Canada" for 1886, a geological section across the 
Rockv mountains in the vicinity of the Canadian Pacific rail- 
way, 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 forma- 
tions are recognized, namely the Cambrian, which Mr. Mc- 
Connell calls also the "Castle Mountain Group;" the Devon- 
ian, which he designates also as the "Intermediate limestone;" 
the Devono-Carboniferous, which he calls the "Banff lime- 
stone ;" and the Cretaceous. In the text it is stated that the 
Intermediate limestone is "mainly composed of a great series 
of brownish dolomitic limestones and has a thickness of about 
1,500 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. According to Mr. McCon- 
nell, the Banfif limestone is the "principal constituent of all the 
longitudinal ranges east of Castle mountain ." 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 collections of the former 
were made. 
These collections have not yet been at all exhaustively 
studied, but most of the species 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 Pugnax closely allied to if not identical with 
P. rockvmontana Marcou ; a Hustedia like H. mormoni 
(Marcou) ; and two well-marked pygidia of Proetus peroccid- 
ens. Hall and Whitfield. The specimens from the black fissle 
