SOME LOCAL DETAILS. 191 



of Mija truncata, but these are modern, and are the 

 " kitchen-middens " of the Indians, wlio in former times 

 encamped here. 



Numbers of Pleistocene shells may be picked up 

 along the shores of the two little bays between Cacouna 

 and Eiviere-du-Loup ; but I found the most prolific 

 locality to be on the banks of a little stream called the 

 Petite Eiviere-du-Loup, which runs between the ridge 

 behind Cacouna and that of Mount Pilote, and empties 

 into the bay between Eiviere-du-Loup and the pier. In 

 these localities I collected and noticed in my paper on 

 this place * more than eighty species, about thirty-six of 

 them not previously published as occurring in the Pleisto- 

 cene of Canada. 



We have thus at Eiviere-du-Loup indubitable evidence 

 of a marine boulder-clay, and this underlies the represen- 

 tative of the Leda clay, and rests immediately on striated 

 rock surfaces, the striae running north-east and south-west. 



The Cacouna boulder-clay is a somewhat deep-water 

 deposit. Its most abundant shells are Leda glacialis, 

 Nucula tenuis, and Tcllina proxima, and these are imbedded 

 in the clay with the valves closed, and in as perfect 

 condition as if the animals still inhabited them. At the 

 time when they lived, the Cacouna ridges must have been 

 reefs in a deep sea. Even Mount Pilote has huge 

 Lauren tian boulders high up on its sides, in evidence 

 of this. The shales of the Quebec group were being 

 wasted by the waves and currents; and while there is 

 evidence that much of the fine mud worn from them was 

 drifted far to the south-west to form the clays of the 

 Canadian plains, other portions were deposited between 



* Canadian Naturalist, April, 1865. 



