158 PROCEEDINGS OF THE PALEONTOLOGICAL SOCIETY 



The general session of the Society was called to order at 2.30, Thurs- 

 day afternoon, and the first paper was presented by the author; 10 min- 

 utes. 



STRATIGRAPHY OF THE CANADIAN CORDILLERA 

 BY LANCASTER D. BURLING 



{Abstract) 



A nearly complete specimen of a fossil fish was found in the "Jurassic" 

 shales outcropping on the Canadian Pacific Railway west of Banff. Alberta, 

 and further fossil evidence was secured as to the true age of this "down- 

 faulted block." 



The Devonian was found to rest without observable unconformity on the 

 Cambrian in the Sawback Range just west of Banff, and at the upper end of 

 Upper Columbia Lake, and fossil evidence Mas secured as to the portions of 

 the Cambrian and Devonian involved in these contacts. Between these two 

 localities the Devonian is not present and the Cambrian is overlain by approxi- 

 mately 10,000 feet of Ordovician and Silurian strata. 



The "Devonian" Sawback formation was studied in detail and collections 

 were secured from a dozen or more faunal horizons, ranging from the top to 

 the lower portion of the formation. These a're all of Cambrian age. 



The "Silurian" Ilalysites beds near Golden, British Columbia, were found 

 to contain, in a horizon above the massive quartzite, an abundant fauna which 

 is strikingly comparable with the Richmond of Manitoba. 



The relations of the "Graptolite shales" were more closely determined by 

 the finding of fossils in the lower portion of the "Ilalysites beds" above and 

 in the upper portion of the Goodsir shales below. 



Further paleontologic evidence was secured concerning the Cambro-Ordo- 

 vician boundary and the age relations of the Goodsir shales and the Ottertail 

 limestone. 



Following this paper the discussion of the three papers of the morning 

 on the Mississippian controversy was undertaken and was J3articipated in 

 by Messrs. Weller and Ulrich. 



The following was then presented and illustrated by lantern slides; 15 

 minutes. 



NEW SPECIES OF THE MESONACIDJE, WITH TWENTY-NINE RUDIMENTARY 

 SEGMENTS POSTERIOR TO THE FIFTEENTH 



BY LANCASTER D. BURLING 



(Abstract) 



Mr. E. C. Amies, of Edmonton, Alberta, while acting as my assistant in 

 field-work for the Geological Survey of Canada, found a new species of the 

 Mesonaeida* in the Mahto formation of the Lower Cambrian in the Mount 

 Robson district of Alberta. 



In general form and in the discrepancy between the segments anterior to 



