The Canadian journal of industry, science and art . Pig. 12&.—Oraptolithws prisHs Fig. 19d.—Lingula fig. iOd.—TriarthniS Becki (Hisinger). o6^«ja.{Hall.) (Green). 204 A POPULAR EXPOSITION OF THE. Fig, 201.—Asaphus Canadensis (Chapman). In addition to the above forms, several species of brachiopods,which occur also in both the Trenton and Hudson River Groups, arealso frequently met with. The most abundant of these comprise:Orthis testudinaria (fig. 182), Strophomena alternata (fig. 186),Rhynconella increbescens (fig. 187), and Leptcena sericea (fig. 204). In Western Canada, the TJtica formation
The Canadian journal of industry, science and art . Pig. 12&.—Oraptolithws prisHs Fig. 19d.—Lingula fig. iOd.—TriarthniS Becki (Hisinger). o6^«ja.{Hall.) (Green). 204 A POPULAR EXPOSITION OF THE. Fig, 201.—Asaphus Canadensis (Chapman). In addition to the above forms, several species of brachiopods,which occur also in both the Trenton and Hudson River Groups, arealso frequently met with. The most abundant of these comprise:Orthis testudinaria (fig. 182), Strophomena alternata (fig. 186),Rhynconella increbescens (fig. 187), and Leptcena sericea (fig. 204). In Western Canada, the TJtica formation (No. 7 on the map, ) occupies a small area in the immediate vicinity of Ottawa city,another in the township of Cumberland, and a third in Clarence andPlantagenet (Counties of Russell and Prescott) ; but it is far moreextensively developed in the geological region on the western side ofthe gneissoid belt which crosses the St. Lawrence at the ThousandIsles. In this region, it forms the shore of Lake Ontario from alittle west of Cobourg to the township of Pickering, and sweeps fromthese points to the north-west, coming out at Georgian Bay in thetownships of Nottawasaga and Collingw
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