1895. ] NEW YORK ACADEMY OF SCIENCES. 101 
THE PROTOLENUS FAUNA 
By G. F. Marruew, CorrEsPONDING MEMBER. 
TABLE OF CONTENTS. 
INTRODUCTION. 
The Atlantic Basin the 4 a section. 
Classification of the Cambrian. 
Development of our knowledge of the Cambrian Faunas. 
The base of the Cambrian. 
THE CAMBRIAN FAUNAS IN NEW BRUNSWICK. 
Review of former work on the Cambrian of Southern N. B. 
Section at Hanford Brook—comparison with Newfoundland. 
DESCRIPTION OF SPECIES. 
Forminifera — Spongida — Brachiopoda—Mollusca—Ostracoda—Phyllo- 
poda—-Trilobita. 
List of species, localities and horizons. 
COMPARISONS AND CONCLUSIONS. 
Distinctive characters of the Fauna. 
Its probable relations to the Olenellus Fauna. 
Some of the material collected by an exploring party from 
Columbia College, New York, conducted by Mr. Gilbert van 
Ingen, having been placed in my hands for study, this I have 
examined and give the result in the following pages. 
The material under examination was all collected from Band 
b of Division 1 of the St. John Group and was studied in con- 
nection with other material in my hands, previously collected 
from the same zone by W. D. Matthew and the author. 
Investigations of the Cambrian faunas by the present writer 
have been principally confined to those of the Atlantic Basin, 
the only part of the world where thorough work has been done 
on the organic remains of this age. Sporadic representatives of 
the Cambrian types of animal life have been gathered from 
South America, Australia, India, China and Siberia, but none 
of these give that comprehensive view of the succession of liv- 
ing forms in that distant period which can be gathered from a 
study of the Atlantic Cambrian faunas. 
A good deal is known of the faunas of this age that occur in 
the Cambrian strata in the west of the United States, owing to 
the admirable work done in that section of the Union by the 
officers of the United States Geological Survey; but, neverthe- 
less, the Cambrian rocks of the Atlantic Basin remain the 
standard for determining the succession of faunas, and for the 
comparison of their facies. 
as 
