4 
MUSEUM BULLETIN NO. 3 . 
FAUNAL SUMMARY OF THE SECTION. 
Introduction. 
The lithic characters of the zones were given in the earlier 
paper 1 and repetition at this time is unnecessary. The com- 
plete faunas of each formation will be given, but not zonally. 
Two systems are represented in the Anticosti Island succes- 
sion; Ordovician and Silurian. The basal division of the Anti- 
costi Ordovician cannot be seen in place; but fragments in the 
shore material for about fifteen miles on the western end of the 
north shore show its presence at no great depth below the sur- 
face of the water. Since the material is most abundant and in 
the largest pieces near the buried divide of the Channel lowland, 
it is probable that the parent rock outcrops over a considerable 
extent on this ridge. It has been called the Macasty black shale 
The rock consists of a soft, highly bituminous black shale and 
carries a small biota of five species as follows: Climacograptus 
spiniferus , C. typicalis magnificus , Leptobolus in$ignis } Triarthrus 
becki macastyensis and Orthoceras? sp. Both lithology and fauna 
are in harmony with a correlation with the Utica as developed at 
Ottawa and elsewhere in eastern Canada. 
Ordovician System , Richmond Series. 
English Head Formation. The lowest rocks of this forma- 
tion meet the waters of the North channel at the edge of the 
reef near English head on the northwest end of the island, and 
the summit is placed at the top of the so-called “track bed”, a 
bed marked by peculiar impressions which Billings considered as 
probably the tracks of cephalopods. The fauna consists of one 
hundred and seven species of which seventy-nine pass into higher 
formations. Brachiopods are the most numerous, both in species 
and individuals, with the gastropods vying with them in each 
Schuchert and Twenhofel, Bull. Geol. Soc. Am., Vol. 21, 1910. 
