NO. 5 CAMBRIAN TRILOBITES 353 



tion ' in the Mount Stephen section. Its horizon is indicated by its 

 being stratigraphically beneath both Olenellus canadensis and Meso- 

 nacis gilberti and Corynexochus {Bonnia) Heldensis, all of which are 

 characteristic of the upper portion of the Lower Cambrian fauna. 



At locality 35m B. (Poliella) primus is associated with Agraulos 

 stator Walcott. , 



At locality 356 with : 



Micromitra (Paterina) wapta Walcott 

 Obolus parvus Walcott 

 Acrothcle colleni Walcott 

 Hyolithes bilKiigsi Walcott 

 Olenopsis agnesensis Walcott 

 Ptychoparia sp. 

 Albertella sp. 



At locality syr with : 



Micromitra {Paterina) labradorica var. 

 Micromitra (Iphidella) pannula (White) 

 Acrotreia sagittalis taconica (Walcott) 

 Ptychoparia 3 spp. 



At locality sye with : 



Acrothele colleni Walcott 



Acrotreta sagittalis taconica (Walcott) 



Scenella varians Walcott 



Stenotheca elongata Walcott 



Albertella sp. 



Olenellus canadensis Walcott 



At locality 57! with : 



Hyolithes billingsi Walcott 

 Scenella varians Walcott 

 Ptychoparia, 2 spp. 

 Olenopsis agnesensis Walcott 



At locality 58s with : 



Micromitra (Paterina) labradorica xar. 

 Micromitra (Jphidella) pannula (White) 

 Acrotreta sagittalis taconica (Walcott) 

 Ptychoparia 3 spp. 

 Formation and locality.— 'Lower Cambrian : Mount Whyte forma- 

 tion : (356) Dark-gray, siliceous shale of the Lakes Louise and Agnes 

 Cambrian section; amphitheatre between Popes Peak and Mount 

 Whyte, south of Lake Agnes, south of Laggan, on the Canadian 



Canadian Alpine Journal, Vol. i, No. 2, (Sept.) 1908, pp. 240-242. 



