234 H. W. SHIMER SPIRlFEROIDS OF LAKE MINNEYVANKA SECTION 



MISSISSIPPIAN 



Feet 

 Lower Banff shale ; dark gray to black calcareous shale 1,300 



DEVONIAN 



* 



Lower Banff limestone; heavy bedded, light gray limestone _. 1,000 



Intermediate limestone; alternating fine to coarse grained limestone, . . . 1,600 



The spiriferoids are distributed as follows : 

 Pennsylvanian (Upper Banff limestone, upper portion) : 



Spirifer rocky mont anus. 

 Spirifer cameratus. 



Mississippian- (Upper Banff limestone, lower portion, and Lower Banff 

 shale) : 



Spirifer centronatus. 



Spirifer centronatus albapinensis. 



Spirifer striatus. 



Spirifer striatus madisonensis. 



Amboccelia umbonata. 



Reticnlaria pseudolineata. 



Devonian ( transition beds from Lower Banff shale to Lower Banff 

 limestone, and Lower Banff limestone) : 



Spirifer notabilis. 



Spirifer whitneyi animasensis. 



Cyrtia cyrtiniformis. 



Affinities of the Fauna 



28, 1912. 



Perhaps the most interesting feature of the fauna next to its abundance 

 is its close affinity with those of the Yellowstone Park and of Colorado. 

 The spirifers of localities 20 to 35 present a distinctly Madison , aspect, 

 as that aspect is described by Girty in his "Monograph on the Yellowstone 

 National Park." The especially noteworthy feature common to the two 

 localities is the dominating abundance of Spirifer centronatus repre- 

 sented by both the typical species and the variety albapinensis. 



Similar relationship is seen to exist between the spirifers of the beds 

 transitional from the Lower Banff limestone to Lower Banff shale (lo- 

 cality 38) of the Canadian region and the Devonian fauna of the Ouray 

 limestone of Colorado, described by Kindle (Bulletin of the United 



