38 | THE ROYAL ‘SOCIETY OF CANADA 
the L. Minnewanka section and referred them to Dr. Geo. H. Girty 
of the United States Geological Survey who has a wide acquaintance 
with the faunas of this and related horizons in the Rocky Mts. of the 
United States. Dr. Girty concludes that these faunas represent the 
horizon of the Lower Triassic (Meekoceras beds) of Idaho, Utah, 
and Wyoming. If this opinion is correct, as I believe it to be, the 
reputed Jurassic beds from which the fossil fish transmitted to you 
were obtained and the ‘Permian’ of the Banff map! as well should be 
referred to the Triassic. Inasmuch as most of the species in this 
fauna are new this determination will have to rest for the present 
on evidence of a somewhat general character.” 
PES CRON OF SPECIES 
Celacanthus banffensis, sp. nov. Plate I. 
This species is represented in Mr. Burling’s collection of 1915 
from near Banff, by a pectoral fin, plate I, figure 1, of large size, and 
numerous cycloid scales preserved together on the same rock surface 
(Cat. Nos. 756, 756a). 
Judging from the characters displayed by the fin in conjunction 
with those of the scales the fish is thought to belong to the genus 
Celacanthus of Agassiz. The preservation of the fin is good and the 
structural characters seen in it and the scales are sufficiently diag- 
nostic to convince one of the Ccelacanthid affinities of the fish repre- 
sented as well as of its probable proper reference to the genus Cælacan- 
thus yet the limited amount of material at present available renders 
it expedient to make a more positive reference to this particular genus 
dependent on the confirmatory evidence of more comprehensive 
specimens from the same general locality. The above name proposed 
for the species is also regarded as provisional. 
The fin is 102 mm. (4 inches) long and 38 mm. (14 inches) in 
maximum breadth, and consists of a basal lobe with about twenty- 
four articulated, non-bifurcating rays proceeding therefrom. In 
outline it is roughly triangular with a short base and long convex sides. 
The lobe of the fin is narrow, rounded in outline distally, and 
protrudes into the fin over one-quarter of the latter’s length. It 
occurs in the fossil as a vacant space at the base of the fin, and al- 
though scales are indistinctly seen in this area they may not be in 
place. The greater number of rays and the longest ones proceed 
from the anterior margin of the lobe. On the posterior side the 
rays are short and comparatively few. 
The rays are stout, broadest at mid-length whence they narrow 
gradually to the distal end, without bifurcation. The long, principal 

1 Locality cited. 
