133 



diately opposite the Fort, a considerable amount of rock has been quar- 

 ried and used in the construction of the building. In these beds I 

 succeeded in finding several well-defined and characteristic fossils, 

 sufficient to establish without the least doubt, the age of the Red River 

 limestones. They are, Favoaites hasaltica ; Coscinopora sulcata; hemi- 

 spheerical masses of Syringopora; a Conularia ; a small, beautiful, unde- 

 termined species of Pleurorhynchus , Ormoceras Brongniartii ; Pleuroto- 

 maria lenticularis (?) ; Leptcena alternata . Leptmna plano-convexa (?) ; 

 Galymene senaria ; and several specimens of the shield of Illcenus crassi- 

 cauda. Many of these are identically the same fossils which occur in the 

 lower part of F. 3, in Wisconsin and Iowa, in the blue limestones of 

 Indiana, Ohio, Kentucky and Tennessee, and also in the Lower Silurian 

 of Europe. The Coscinopora is precisely the same as the coral which is 

 particularly characteristic of the lower beds of the Upper Magnesian 

 limestone of Wisconsin. The specimens of Favosites hasaltica cannot be 

 distinguished from those which abound in the Upper Magnesian limestones 

 of Wisconsin and Iowa, and the Lower Coralline beds of the Falls of the 

 Ohio. It is also worthy of note that these limestones of Red River, 

 like their equivalents in Iowa and Wisconsin, are highly magnesian, con- 

 taining from seventeen to forty per cent of the carbonate of that alkaline 

 earth." In an appendix to this Report, two new species of fossil mol- 

 lusca, viz., Pleurotomaria muralis and Pleurorhynchus antiqua, are either 

 described and figured, or merely figured. The first of these is said to 

 occur in the Upper Magnesian limestone (F. 3) though, in a subsequent 

 tabular list of fossils, it is referred, perhaps inadvertently, to the Lower 

 Magnesian limestone or Calciferous (F. 2). In this tabular list the Upper 

 Magnesian limestone (F. 3) is subdivided into F. 3 a (the Trenton), F. 3 b 

 (the Galena, Utica and Hudson River group), and F. 3 c (the Coralline 

 and Pentamerus beds, the Clinton and Niagara.) Of the other fossils 

 from Lower Fort Garry, in this list, two (and one, " Orthoceras verte- 

 hrale,'' with a query) are referred to F. 3a ; four to F. 3b ; and one 

 (Coscinopora sulcata) to the horizon of the Niagara limestone in F. 3 c. 

 The official Report of Captain Palliser's Explorations in British North 

 America in 1857-60 contains the following list* of the fossils collected at 

 Lower Fort Garry by Sir James Hector, apparently in July, 1857, and 

 determined by Mr. Salter. 



" Magnesian Limestone, Lowbe Fort Garry. 



Oyathophyllum. Strophomena euglypha. 



Columnaria alveolata, Hall. Orthis biforata, var. lynx. 



Ormoceras Lyoni, Stokes. Spirifer elegantula. 



. !Favistella. (Favosites basaltica, Owen.) Maolurea. 



Receptaculites oocidentalis, Salter. Ehynchonella increbescens, Hall. 

 Strophomena plano-convexa. 



* "With the typographical errors corrected 



