PART I CHAZYAN AND RELATED BRACHIOPODS—COOPER 15 
from them, when compared with brachiopods from the Mystic conglomerate, the 
Table Head of Newfoundland, and the Pogonip of Nevada, suggest that the 
dating should be with at least part of the Whiterock stage. Billings (1865) de- 
scribes species dissolved out of silicified pieces from Limestone (boulder bed— 
No. 2) which are suggestive of post-Canadian brachiopods. These are Orthidium 
gemmiculum, Nothorthis delicatula, Trematorthis lévisensis, and Pleurothis tri- 
tonia. None of these genera have yet been taken from the highest Canadian 
(Black Rock). 
Quebec City formation—Much of Quebec City rests on the Quebec City 
formation which is in fault contact with the Sillery formation (Lower Ordo- 
vician-Canadian) and the Utica-Loraine shales. The Quebec City formation 
also occupies the west side of the Island of Orleans in the St. Lawrence River. 
The rocks are hard, fine-grained limestones, dark shales, and thin limestone con- 
glomerates. The thickness is not yet known and the structure and stratigraphic 
sequence have not been determined. According to Raymond (1913a, p. 29), 
pebbles in the limestone conglomerate are fossiliferous and contain Bilobia pisum, 
the trilobites Tretaspis and Lonchodomas hastatus, and the sponge Nidulites. 
The shales contain the graptolite Corynoides calycularis. These fossils suggest 
the Rysedorf conglomerate of New York, the lower part of the Edinburg forma- 
tion of northern Virginia, and the lower part of the Chambersburg formation of 
Pennsylvania and Maryland. Paterula amii also occurs in the formation. 
Through the kindness of René Bureau, Laval University, Quebec, I examined 
collections of brachiopods and trilobites from the Quebec City formation. One 
collection contained excellent specimens of Sowerbyites (S. sp. 1) and Valcourea 
sp. 5 which indicate affiliation of that part of the Quebec City formation with 
the Lincolnshire formation or the part of the Tellico formation that abounds in 
Sowerbyites. 
Another collection loaned by Dr. Bureau contained a fine large O-roplecia like 
O. multicostellata and Paucicrura-like punctate shells. These suggest the lower 
Edinburg and Chambersburg, but I was assured by Dr. Bureau that the Sower- 
byites was younger than the assemblage with O-roplecia. Possibly the various 
faunas come from boulders because the sequence in the Southern Appalachians 
is the reverse of that in the Quebec City. 
On the chart, the Quebec City formation is interpreted as similar to the Ryse- 
dorf conglomerate and given the same age. From these few remarks it should be 
evident that the Quebec City formation invites close paleontological and strati- 
graphical study. 
MONTREAL AND VICINITY 
The lowest beds in the vicinity of Montreal of concern here are heavy-bedded, 
hard limestones belonging in the upper Chazy Group. These extend from Mon- 
treal to the vicinity of Hawkesbury, Ontario, along the Ottawa River. Little 
sand is present in the Chazy at this place. The limestone becomes thinner and 
thinner to the west and does not extend far west of Ottawa. It is believed that 
limestone is at least partially equivalent to the sands and shales of the Chazy in 
- 
