26 ROYAL SOCIETY OF CANADA 



11. Cretaceous. Veetebrate remains fro^i the Fort Pierre 

 GROUP. — The same paucity of vertebrate remains is to be recorded from 

 the Fort Pierre group of the North West Territory. The remains 

 so far collected are of Selachii and consist of a tooth and a pectoral 

 fin from localities in Saskatchewan and Assiniboia. 



Without doubt our knowledge of the vertebrate faunas of the Na- 

 naimo and Fort Pierre groups could be greatly extended by a moderate 

 amount of systematic collecting, and the same may be said of the 

 faunas of the different geological horizons throughout this country 

 generally. The few fish remains so far obtained from the two Cre- 

 taceous groups just mentioned have been found by local collectors at 

 odd times, or by officers of this Survey (other than palaeontologists), 

 who, with their time fully occupied with exploratory and purely strati - 

 graphical work, have been quite unable to afford the time necessary for 

 even a hurried search for fossils in the most promising localities. 



12. Cretaceous. Vertebrate remains from the Edmonton 

 series. — The Edmonton series, constituting the highest beds of the 

 Cretaceous system in the western plains, has furnished its quota of 

 dinosaurian remains in the shape of excellently preserved crania, with 

 other parts of the skeleton, of the large carnivore Dryptosaurus incras- 

 satus from the Eed Deer river in Alberta. These remains, first described 

 by Cope in 1892, form the subject of an illustrated memoir by the writer'- 

 now in the press. This dinosaur, with an estimated length of about 

 thirty-three feet, and a length of head, from actual measurement, of 

 over three feet, was the largest of the Theropoda and combined strength 

 with a capability of rapid motion. It formed a proper culmination to an 

 important section of a race that had played its part in the life history 

 of this earth, and was destined not to survive the close of the Cretaceous 

 epoch. D. incrassatus, from the west and D. aquilungnis from the Cre- 

 taceous of New Jersey, belong to the family of Megalosauridse, and are 

 the best known species of the genus. 



13. Dinosaurian vertebra from Mesozoic beds. — A cervical 

 vertebra of a dinosaur described by Professor A. L. Adams in 1875 

 under the name Arctosaurus osborni, was obtained many years previous- 

 ly by Captain Sherrard Osborn from beds of Mesozoic age at Rendezvous 

 mountain at the north end of Bathurst island in 70° 36' north latitude. 

 The exact age of the beds is uncertain, but it is interesting to know 

 that remains of a dinosaur have been found at the northernmost limits 

 of Canada. Arctosaurus oshorni, the only species of the genus, is re- 



^ Geol. Surv. of Canada, Contr. to Can. Palœon, Vol. III. (quarto), part 

 III., " On Dryptosaurus incrassatus (Cope), from the Edmonton series of the 

 North West Territory." 



