89 
NEW JURASSIC SPECIES FROM THE HAZELTON GROUP OF 
BRITISH COLUMBIA 
By F. H. McLearn 
CONTENTS 
Page 
Introduction 89 
Stratigraphy and correlation 89 
Systematic descriptions 91 
Illustrations 
Plates XIX to XXV. Illustrations of fossils 
137-149 
INTRODUCTION 
The fossils herein described were collected by G. Hanson in the field 
seasons of 1924 and 1925. They are important because they make possible 
a very exact dating of a part of the Hazelton group. Grateful acknowledg- 
ment is made to Mr. S. S. Buckman, F.G.S., the English authority on 
Jurassic ammonites, for valuable advice. Without his direction the 
writer would not have attempted the detailed comparisons of the ammo- 
nites with those of Europe. Mr. Buckman in particular aided in the 
determination of the ammonite genera, the recognition of the affinities 
of Guhsania n. gen., and in the correlation with England. The writer, 
however, is alone responsible for all statements in this paper. 
STRATIGRAPHY AND CORRELATION 
The Hazelton group of Hudson Bay and Babine mountains in Hazelton 
district, B.C., recently studied by G. Hanson, contains 1 an upper sedimen- 
tary division, an upper volcanic division of massive breccias, tuffs, flows, 
etc., a middle sedimentary division, a lower volcanic division of tuffs, etc., 
and sediments at the base. The middle sedimentary division was found 
by Hanson to be fossiliferous and collections were made at several localities. 
The best collection came from a locality about one mile southeast of Silver 
lake, on Hudson Bay mountain, where fossils occur in the talus from a 
cliff containing 300 to 400 feet of vertical strata of the middle sedimentary 
division. The fauna found at this place includes the following: 
* 1 Hanson, G.: Gaol. Surv., Canada, Sum. Rapt. 1924, pt. A, pp. 24-20. Also personal communication based 
on bald work of 1925. 
