168 Canadian Record of Science. 
observed,’ its fossils recognized, its bituminous strata detect- 
ed, and its position is everywhere the same between the 
Trenton (below) and the Hudson River (above). 
The following table indicates the sequence of terranes in 
Canada during that portion of Paleozoic times when no 
break whatever occurred in the deposition of marine 
sediments, when life progressed and flourished in the quiet 
depths of the Ordovician seas or along their shores. The 
relative position of the Utica is herein also indicated. 
These Ordovician terranes are numbered from 1 to 7 in the 
natural order in which they were deposited :— 
. Hupson River (= LORRAIN»). 
. Utica. 
. TRENTON. 
. Brrp’s Ey AnD Brack River. 
. CHAZY. 
. CALCIFEROUS. 
. Potspam. 
The remarkable continuity of the Trenton limestone, so 
abundant in fossil remains, and so uniform in its mode of 
occurrence and deposition throughout the Provinces of 
Quebec and Ontario in Canada, is admirably kept up in the 
succeeding Utica terrane, whilst the next higher terrane — 
the Hudson River—also presents similar characters of con- 
tinuity, uniformity in sedimentation, life, and in lithological 
characteristics. Coming in between the Trenton and Hud- 
son River terranes the Utica is essentially a transitional 
series of strata, a link in the chain of terranes above noted. 
The following is a section of a portion of the lower Utica 
strata as they were observed on Crichton street, New 
Edinburgh, near Ottawa, during the excavation for water- 
works purposes in 1887 :— 
Rep wr O1ON 
Feet. INcHEs. 
1. Dark grey bituminous limestone band holding 
Leptzena sericea, Sowerby and other species.... 0 9 
2. Soft, friable, purplish black disintegrating and 
fossiliferous shales holding abundance of Orthis 
testudinaria, Dalman, bleached, and Leptwena 
sericea, Sowerby, and Asaphus Canadensis, 
Chapman eateletes ey iele etait elleteteiaehele e's] cial (alae 0 8 
1 This is true of Ontario, Quebec and New York State especially. 
