117 
NEW SPECIES FROM THE COLORADOAN OF LOWER SMOKY 
AND LOWER PEACE RIVERS, ALBERTA 
By F. H. McLearn 
CONTENTS 
Page 
Introduction 117 
Systematic descriptions 120 
Illustrations 
Plates XX to XXIII. Illustrations of fossils 173-179 
INTRODUCTION 
The Colorado group, on lower Smoky and lower Peace rivers, con- 
tains the Dunvegan formation and the Kaskapau (lower shale) and Bad 
Heart (middle sandstone) members of the Smoky River formation. 
Whether it includes, below, a part of the St. John formation and, above, 
a part of the upper shale member of the Smoky River formation, cannot be 
said at present. 
In the following pages twelve new species and the local succession of 
faunas, as at present known, are described. The fossil lists are more com- 
plete than any heretofore 1 given and localities and horizons are treated 
in greater detail. The study is based mainly on collections made in the 
field seasons of 1917 and 1918. 
Acknowledgment is made to Dr. T. W. Stanton for advice in the 
study of the fossils, to A. J. Childerhose for assistance in the collecting 
on Smoky river, and to Messrs. R. W. Coulthard and G. M. Ponton for a 
collection of fossils. 
System 
Group 
Formation 
Member 
Thickness 
Lithology 
Faunas 
Cretaceous 
Colorado 
Smoky 
River 
Bad Heart 
feet 
5-25 
Sandstone 
Scaphitea 
ventricosua 
Kaskapau 
525-545 
Shale 
I. umbonatus 
Prionotropis 
Dunvegan 
450-550 
Shale, 
sandstone, 
etc. 
CorbvXa 
pyriformis- 
Unio dowlingi 
1 Geol. Suit., Can., Sum. Kept. 1917, pt. C, p. 18 C. 
Geol. Surv.,Can., Sum. Rept. 1918, pt. C, pp. 3 C,4 C. 
Ottawa Nat., vol. 36, No. 3, March, 1920, p. 66, 1 plate. 
See also Geol. Surv., Can., Mus. Bull. 29, pp. 9-12, Pis. 34i. 
