NATURAL HISTORY, TORONTO REGION 
The lower sandstones and shales at Niagara are 
poor in fossils, but the Clinton, Rochester and Lock- 
port beds contain a considerable fauna, the common- 
est species near the Falls being Spirifera niagarensis 
and Atrypa reticularis. 
The Guelph dolomite should in reality be separ- 
ated from the Niagara, since it differs so greatly in 
petrographic characters and in fauna from the lower 
members of the series. It nowhere appears in the 
escarpment, but may be seen in quarries near Guelph, 
Galt, Elora and other places on the tableland. The 
rock is yellowish and porous from the weathering out 
of fossils, which are numerous. The commonest 
forms are Megalomus canadensis and species of Mur- 
chisonia and Pleurotomaria. The fossils are gener- 
ally large species as compared with the Niagara 
fossils in the beds below. 
Coelocaulus (Murchisonia) macrospira. 
Poleumita sulcata. 
Conchidium (Pentamerus) occidentale. 
Eotomaria galtensis. 
Megalomus canadensis. 
Pycnostylus galtensis. 
Halysites catenulatus. 
Trimerella grandis. 
Whitfieldella hyale. 
Calymene niagarensis. 
The Salina, lying farther to the southwest, is not 
well displayed in Ontario, but is of importance 
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