Section IV., 1892. 



[ 111 ] 



Trans. Eoy. Soc. Canada. 



VIII. — Xoies on the Ammonites of the Cretaceous roclcs of the District of Athabasca, 



with descriptions of four new species. 



By J. F. Whiteaves. 



(Read June 1st, 1892.) 



The Cretaceous rocks of part of the District of Athabasca were carefully examined 

 by Dr. E. Bell in 1882, and described by him in the Eeport of Progress of the Geological 

 Survey of Canada for 1882-3-4, published in 1885. A few well preserved but for the 

 most part very imperfect fossils were collected by Dr. Bell on Ihis occasion at the Drowned 

 (or Boiler) and Burnt Eapids of the Athabasca, and a provisional list of these fossils is 

 given on page 14 C. 0. of his Eejiort. 



In continuance of these investigations, Mr. E. Gr. McConnell devoted the whole of the 

 summer seasons of 1889 and 1890 to making as complete an examination as practicable of 

 the Cretaceous rocks of the district in question, and contriVmted descriptions of the general 

 results of his observations to the " Summary Eeports " of the Survey for those years. He 

 succeeded in making large and important collections of the fossils of these rocks at Lesser 

 Slave Lake and on the Peace Eiver and its tributaries in 1889, and on the Athabasca 

 Eiver and its tributaries in 1890, but these fossils have not yet been reported upon. 



It has long been known that the Cretaceous rocks of the Athabasca District rest 

 unconformably on limestones of Devonian age, and the following sections of the beds 

 exposed on the Peace and Smoky Elvers and on the Athabasca Eiver and Lesser Slave 

 Lake, have been kindly fvirnished by Mr. McConnell and are here printed by permission 

 of the Director of the Survey. 



Peace Kiver and Smoky Eiver Section. 



W.ipiti River Sandstones :200 feet.4- 



Foxhill Sandstone 



Smoky River Shales c50 feet. 



Dun vegan Sandstones lOOJfeet. 



Fort St. John Shales TOO feet. 



Peace River Sandstones 400 feet. 



Loon River Shales 400 feet 



Pevonian Limestone 400 



feet.-^ ^^ 



Laramie. 



JNIontana. 



Dunvegan. > CRETACEOUS. 



f Colorado. 



DEVONIAN. 



