102 Canadian Record of Science. 
dian Naturalist and elsewhere. (See Dawson in Can. Nat., 
vol. vi., p. 138, et al. loc.) 
In the “Geology of Canada, 1863,” the geology of that 
district is sketched out carefully with the accumulated evi- 
dence at the disposal of the writer (Sir Wm. Logan) at that 
time, but neither here nor elsewhere have I been able to 
find any record made of the occurrence of rocks belonging 
to the Utica formation at Murray Bay. This is my only 
plea for the present notes, which are hereby submitted as a 
humble contribution to the knowledge of the geological his- 
tory of the locality in question. 
From the papers already published, and the lists of fossils 
therein contained, both the Bird’s Eye and Black River and 
the Trenton formations are known to be well developed 
and easily recognized among the Cambro-Silurian or Ordo- 
vician strata of Murray Bay. 
Sir William Dawson has recorded the occurrence of Am- 
bonychia radiata (Hall) along with species indicating a lower 
horizon than that species, but its presence may certainly 
point to the development of strata of less antiquity than the 
Trenton formation in that district, most of which have 
been long since removed, either (?) by glacial action or 
by other denuding agencies at work everywhere. No dis- 
tinction has as yet been made here, I believe, between the 
Trenton measures holding a characteristic fauna and the 
Utica formation, which holds a fauna very similar to the 
rocks ofthe same age at Ottawa, Whitby, Collingwood, and 
other places where that formation is developed. 
From these shales, which are black, bituminous, some- 
what indurated and calcareous at times, holding numerous 
organic remains, the following species of fossils were ob- 
tained in a tolerably good state of preservation : 
RHABDOPHORA. 
1. Diplograptus sp. (resembling D. pristis, Hisinger). 
POLYZOA. 
2. Pachydictya sp. 
