Marcou.J 
216 
[Jan. 21 , 
are clue to pressure of the slates and to enlargement of the len- 
ticular masses, so often seen in all the lenticular masses of the 
Taconic system. 
Until my first exploration and study at Pointe-Levis in 1861, 
no fossils had been found at the Redoubt, where I collected a 
good primordial fauna such as : Arionellus, Dikelocephalus, Con- 
ocephcdites , Menoceplialus , Leptaena , Metaptoma and Cystidae. The 
geological survey of Canada, having sent one of its members to 
see how I made observations in the environs of Quebec, was ad- 
vised of my discovery of fossils at the Redoubt, and of its impor- 
tance as well stratigraphically as paleontologically. I shall only 
repeat what I have already said in 1864 : That the lenticular 
masses found in the three folds of Pointe-Levis are simply the 
result of a local accident of folding, limited to one and a half 
mile square. The magnesian limestone there contains a primor- 
dial fauna, indicating the lower porton of the Supra-primordial 
fauna or Upper Taconic. That the outcrop of Pointe-Levis be- 
longs to the same horizon as the Phillipsburgh group, only it is a 
little below or more exactly the inferior part of that horizon 
That the fossiliferous lenticular masses, called by me “Redoute,’* 
“Milieu,” “Devine” and “Colline Paroisiale” are not formed by a 
“Limestone conglomerate,” as it has been erroneously called by 
some geologists, but by a magnesian limestone, perfectly homo- 
geneous, without any boulders or pebbles of any sort ; and that 
the fossils are disseminated in every part of each lenticular mass, 
either in nests or sporadic. That the fossils with forms of the 
second fauna, are only “prophetic types,” and that we have there 
an example of what Barrande has called his “doctrine des colo- 
nies.” 
The true conglomerate of the lenticular mass called the “Croix 
de Temperance” does not contain any fossils, and the blue pud- 
ding limestone of the most northern part of Pointe Levis, close 
by the shoal of the St. Lawrence, and in the village, does not 
contain any fossils, in either the matrix or the pebbles. 
La Cpiaudiere’s fall. — In following the road from Victoria 
hotel at Levis to the river des Etchemins and La Chaudidre’s fall, 
just when reaching the mouth of the river Etchemin in the river 
St. Lawrence, the slates present flows of diorite or more exactly 
diabase — “old basalt” — which are more or less intercalated and 
even stratified into the slates. The whole country between the 
