Paleontological Notes. 107 
22. Asaphus platycephalus, Stokes. 
23. Lllenus cf. I. Milleri, Billings. 
24. Ceraurus pleurexanthemus, Green. 
Norz.—The strata in the neighbourhood of the rapids and 
falls below the town point to the existence of local faulting 
or dislocations, as they are considerably disturbed and are 
seen to dip to as high an angle as 60° to the S.W. 
L’Assomption River is one of those post-tertiary streams 
which is fast cutting its way through the Leda clay and 
Saxicava sand terranes, as also through the uppermost 
members of the Cambro-Silurian or Ordovician system in 
the higher levels. 
OE 
On THE OccURRENCE OF FossiL REMAINS ON THE MANITOU 
Istanps, Lake NIpiIssina, ONTARIO. 
The Manitou Islands—which form a group of six beau- 
tiful Islands—are pleasantly situated in the basin of Lake 
Nipissing, Ontario, and are easily reached by way of North 
Bay, an important railway centre along the line of the 
Canadian Pacific Railway. Whilst the shores of Lake 
Nipissing are completely made up of Archean rocks, 
these islands are seen to consist at several points of sedimen- 
tary strata which when examined are found to be rich in 
fossil remains and indicate with tolerable precision the 
horizon or period when these strata were laid down. 
The occurrence of Tetradium fibratum, Safford ; Columnaria 
Halli, Nicholson ; Ormoceras Bigsbyi, Stokes, and an obscure 
specimen of Goniceras anceps, Hall, suggest the natural in- 
ference that the limestone beds of these islands belong to the 
Black River formation. 
The early, and, perhaps, only record of fossiliferous lime- 
stones on these islands “holding Orthoceras with a few 
obscure fossils’? may be found in Alex. Murray’s report to 
Sir Wm. Logan for the year 1854" ‘“* Ormoceras. tenuifilum 
of Hall” is therein noted with considerable certainty and 
1 Report of Progress, Geol. Surv. Can. 1853-54 55-56, p. 124. 
