3l6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 75 



Feet Meters 



In a siliceous shale of this zone, about ^ mile (.8 km.) 



east of the great fossil bed, the following species 

 were found (57f) : 



Oboliis mcconnelli (Walcott) 

 Nisusia (Jamcsella) cf . nautes Walcott 

 Hyolithes carinatus Matthew 

 Orthotheca sp. 

 Scenella various Walcott 

 " Ptychoparia " sp. 

 2a. Thin-bedded, bluish-black limestone, forming dark 



broken cliffs in many sections 325 99.1 



Fauna. — Middle Cambrian : in the upper portion of this 

 division just beneath the Ogygopsis shale, in a bluish- 

 black shaly limestone that outcrops in the amphitheater 

 between Mount Stephen and Mount Dermis, the fol- 

 lowing species were found (sSr) : 



Obolus mcconnelli (Walcott) 

 Acrotreta depressa Walcott 

 Hyolithellus annulata Matthew 

 Elrathia sp. 

 Dorypyge sp. 



Neolemis serratus (Rominger) 

 Ogygopsis klotzi (Rominger) 

 At a locality just east of the great fossil bed, the 

 following species were collected (57J.) : 

 Micromitra sp. 

 Nisusia alberta Walcott 

 Hyolithes sp. 



Bathyuriscus rotundatus (Rominger) 

 Neolentis serratus (Rominger) 

 Ogygopsis sp. ? 

 2b. Massive-bedded, gray limestone, breaking down into 



thin layers on weathering 37 1 1 .3 



3a. Gray and greenish siliceous shale 47 14.3 



3&. Gray oolitic limestone in layers 6 inches (1.5 cm.) to 



2 feet (.6 m.) thick 4' 6" 1.4 



Fauna. — Middle Cambrian : 



Micromitra (Iphidclla) pannula (White) 

 Nisusia alberta ? Walcott 

 Hyolithes sp. 

 Microdiscus sp. 



3c. Greenish siliceous shale 15 4.6 



3d. Gray oolitic limestone 6' 6" 1.9 



2,e. Gray, impure dolomitic limestone, compact, fine-grained, 



and weathering buff and yellow 38 1 1.6 



3/. Greenish siliceous shale i .3 



Zg. Similar to 3^ 52 15.8 



3A. Gray oolitic limestone 2' 2" .7 



3t. Similar to 3^ 3 .9 



