362 PALEOZOIC ROCKS OF THE HUDSON BAY REGION 



Thickness 

 in feet 

 Hormotoma whiteavesi. 



Euomphalopterus sp. 



Actinoceras keewatinensis. 



Encrinurus sp. 

 2. Limestone, gray, fine grained, with many rounded 

 masses showing concentric structure resembling stro- 

 matoporoids ; exposed in the lower part of the bluff 

 near the mouth of Shammattawa River and in the 

 lower part of the ledge for 2 miles along Winisk 

 River below the mouth of the Shammattawa; con- 

 taining the following fossils : 12 



Streptelasma pygmceum var. occidentale. 



Zaphrentis stokesi. 



Favosites favosus. 



Alveolites ? sp. 



Stropheodonta acanthoptera. 



Stropheodonta cf. philomela. 



Schuchertella aff. curvistriata. 



Orthis cf. flahellites. 



Dalmanella elegantula. 



Clorinda mesoplicata. 



Camarotoechia ekwanensis. 



Camaratoechia sp. 



Glassia variaMlis. 



Atrypa cf. reticularis. 



Rhynchospira lowi. 



Hormotoma whiteavesi. 



Hormotoma sp. 



Euomphalus rotundus. 



Eotomaria sp. 



Strophostylus fiUcinctum. 



Leperditia hisingeri var, 

 1. Limestone, gray, fine grained, thin bedded, with few 

 fossils; exposed near the base of the bluff a short 

 distance above the mouth of Shammattawa River ... 8 



Besides the fossils mentioned above, the following species were col- 

 lected from loose fragments of Silurian limestone at this locality. These 

 indicate the presence of the Ekwan Eiyer limestone farther np the river, 

 but the strata from which they came were not seen. 



Halysites catenulatus. 

 Trimerella horealis. 

 Meristina expansa. 

 Liospira stevensoni. 

 Megomphala rohusta. 

 Trochonema sp. 

 Cf. rieurotomaria hoyi. 



