T. 8S, Hunt on some points in the Geology of Vermont. 223 
Levis division has yielded a great number of organic forms 
which have been carefully studied by Mr. Billings and Prof. 
James Hall, The latter has described not less than fifty-one 
species of Graptolitidese, which are figured in the second de- 
cade of Canadian Fossils, while most of the other species, in- 
cluding twenty-eight brachiopods, forty-two gasteropods, twen- 
ty cephalopods, and seventy-four crustaceans, have been de- 
scribed by Mr. Billings, The whole number of species described 
up to this time from the Levis formation, is 219; of these 
five have been detected in the Chazy and ten in the Calciferous, 
all the others being peculiar to the Quebec group, whose posi- 
tion is thus, it would seem, clearly defined as intermediate be- 
tween the Calciferous and Chazy formations; none of its nu- 
merous species having been recognized in higher or lower rocks 
these. The chief localities of these fossils are at Point 
Levis and Orleans island near the city of Quebec, and at Phil- 
lipsburg and Farnham near Missisquoi bay; but many of the 
characteristic forms are met with at numerous points between 
these two regions, the graptolites of the division in particular 
ving been recognized among the cupriferous diorites on the 
8t. Francis at Drummondville, and in the plumbaginous slates 
near the outlet of Lake Memphramagog. 
This group of rocks appears in the province of Quebec along 
the southeast side of a great fault which has been traced from 
below the City of Quebec to the line of Vermont on Missis- 
me Bay. By this dislocation it is raised up along side of 
he rocks of the Trenton and Hudson river formations, and in 
one place is brought in contact with the Medina formation. 
these higher strata, which are in some cases inverted along 
the line of fault, are often overlaid, and thus made 
pass beneath the Quebec group. A little to the south of the 
province line this same fault brin up a still lower formation, 
This has been traced continu- 
usly from near Missisquoi bay to Shoreham, along the east 
Side of the line of fault, while to the west appear the over- 
gan, passing in some cases not less than a mile 
the nearly horizontal layers of the Red Sandrock, which 
_ Were by the earlier- observers very naturally referred to the Me- 
: .. ormation, itself a red sandstone, and next in natural suc- 
sgt waa the Hudson River formation in the New York series. 
4n like Manner the strata of the Quebec group, which, in Can- 
