: Res 
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276 * Scientific Intelligence. oie 
One hundred feet below the lowest spreads the plain of Lower Canada, 
containing abundant marine shells, all of them, with one or two excep- 
tions if any, recent. It consists (1.) of a sand deposit, sometimes gravelly 
beneath, and containing marine shells in its lower part; (2.) an unctuous 
often scratched and polished. 
The trap boulders derived from the Montreal mountain, as Dr. Bigsby 
early pointed out, were drifted southwest, and have been traced 270 miles ) 
to the south shore of Lake Ontario. But the terraces are most distinet 
on the northeast side. Under the boulder clay the surfaces are striated, | 
and northeast of Montreal mountain, the directions observed were S. 70° 
W., to 8, 50° W. . ; | 
The deposits of the plain appear to be in part at least of littoral or 
shallow water origin.. This is indicated for the upper layer, near the Tan- 
neries, by the great numbers of Sazicava rugosa. But the clay below 
abounds in Nucula (Leda) Portlandica, which probably lived in muddy 
bottoms 10 to 15 fathoms in depth, The same arrangement Is 0 served 
at other localities. Mr. Dawson names the upper layer the Saicava 
sand, the lower the Leda clay. | 
From the Leda clay near St. Denis, at the cutting of the Montreal and | 
ir W. gan has obtained a number of caudal ver- 
tebree of a Cetacean, part of the pelvis of a seal, and fragments of woo | 
of the cedar (Thuja occidentalis). At one locality, the: following spect’ 
(on 
Stones and valves of Mya truncata), Watica clausa, Buccinum ciliatum,* 
B.undatum, Admete viridula,* Acmaea caca,* Nucula minuta, Lacuna 
neritoides,* Natica helicoides?* Fusus scalariformis,* Serpula vermew 
faris* Margarita arctica,* Modiolaria discors, Rissoa minuta,* Bulla de- 
Bilis 2* Trichotropis arctica,* Cytheridea Mulleri?* Velutina zonal 
Yesides several species of Foraminifera,* masses of siliceous spicu 
Sponge (Tethea*). From the associated shells it appears that the 
brated locality ker (Cy 
clop terus Lumpus), at Green’s Creek on the Ottowa belongs to this level, 
other reported species of the Canada post-tertiary. ; 
The locality at Beauport near Quebec, described by Captain B 
and Sir C. Lyell, belong to this same level, and has afforded, ae 
others already named, the following not enumerated above: B pe 
Hameri, Natica Groenlandica,* Natica Heros,* Turritella erosa,* Sco® 
a ty, 
