Paleontological Notes. 105 
east and reappears some 500 miles down the St. Lawrence— 
at the Mingan Islands, nurth of Anticosti. 
THe Brrp’s Eve anp Buack RIVER. 
The Bird’s Eye and Black River terrane of Joliette con- 
sists of fifty feet of limestone holding the well known and 
typical fossil corals, viz: Columnaria Halli, Nicholson, and 
Tetradium fibratum, Safford. These fifty feet of strata form 
the base of Sir William Logan’s Trenton in this district 
whose total thickness he estimated at 480 feet. 
THe TRENTON. 
During the summer of 1881 the writer had an oppor- 
tunity afforded him of examining the beautiful exposures 
of this highly fossiliferous terrane along the banks of 
L’Assomption River for a distance of some three miles, and 
obtained quite an interesting suite of specimens which it is 
proposed to place on record in this paper. 
No Trenton fossils are described or referred to by Sir 
Wm. Logan in the volume cited above. 
The Trenton, however, is therein described and sub- 
divided into three sections in descending order as follows :— 
Feet. 
a.)—Evenly bedded and dark coloured limestone..-......--+ 200 
joe MIMEStOMe a ose eee ee eka ose siete wo siete 140 
@)—Gravecoloured limestone ices seen cieeiacie clos eioe eile -rele 90 
PROG A Reeser rete, che resets vous at ave wipe cey ToRSeoe Ten elss rela TCM er eater iahclagdaseat eevee 430 
From a collection made at “Industry Village,” in 1852, 
by Sir William Logan, the following forms have been deter- 
mined by the writer : 
1. Strophomena alternata, Conrad. 
2. Leptena sericea, Sowerby. 
3. Orthis testudinaria, Dalman. 
4, Asaphus Canadensis, Chapman. 
It would thus appear from the above list that we have 
here strong evidence for the presence of the upper beds of 
the Trenton with the probable existence of the Utica ter- 
rane. The occurrence of Asaphus Canadensis, Chapman, 
indicates close proximity to the Utica, if not indeed. the 
