157 
at the right, the contact of the Lowville and Black River 
may be seen. 
Another quarry between the cemetery of Notre Dame 
de Lourdes and the river shows the cherty beds of the 
crinoid zone of the Trenton very well, but the same beds 
are better seen at Hull. Two hundred yards (182-8 m.) 
farther north near a small brook, is another quarry in the 
upper division of the Black River. Fossils are very rare 
here. 
BRITANNIA AND WESTBORO. 
Aylmer and Pamelia Formations——On the shore of 
Lake Deschénes north of Britannia village, a canal has been 
dug through the lower sandstone strata of the Aylmer 
formation, and the debris which has been thrown out on. 
either side provides an excellent collecting place. Fossils 
other than burrows and trails are not very common, but 
Lophospira billings, Isotelus arenicola and others have been 
found here. 
At the point where the Richmond road crosses the 
Ottawa Electric Railway tracks is a small excavation in 
black shale, where specimens of Beyrichia (?) clavigera and 
other ostracods may be obtained. 
Near the top of the hill at Westboro a cutting exposes 
the limestone belonging to the lower part of the Pamelia. 
At the roots of a bunch of cedars to the left is a small 
exposure of black shale capped by rusty weathering dolo- 
mite, or ‘“‘cement beds,’’ as they are called here. At the 
bottom of the hill, a blue-black limestone with wavy, 
Stromatocerium-like structure, can be seen. At a little 
cove just above the ruins of Skeads’ mill one sees the 
black Beyrichia (?) clavigera shale, resting on an impure, 
yellow-weathering limestone and capped by hard sandy 
beds. The lowest layers here probably belong to the 
upper part of the Aylmer formation. An escarpment runs 
back from this point to the Canadian Pacific Railway 
tracks. In a little cutting here, and in the fields on both 
sides of the tracks, is found a great quantity of very 
fossiliferous limestone of the lower part of the Pamelia, 
from which quite a number of species can be obtained. 
This is the type locality for Bathyurus acutus. 
In following the Canadian Pacific Railway track from 
this point to Mechanicsville, an opportunity is presented 
of seeing outcrops of the limestone of the upper part of 
