C. Sehuchert — Notes on Arctic Paleozoic Fossils. 471 



English Head formation so well developed on the Island of 

 Anticosti, G-ulf of St. Lawrence. 



2. Ordovician. Black, impure, thin-bedded, fine-grained lime- 



stones and black limy shales that weather yellowish white, 

 with scattered small fossils as follows : 



Climacograptus bicornis (Hall). Common at French Head 

 in Cyrus Field Bay and in Fox Land on western Baffin 

 Island. (Also called Diplograptus dentatus by Emerson, 

 p. 576.) 



Leptobolus lepis Hall ( — Lingula curt a, p. 578). 



Cyclora parvula (Hall) (= Cyclonema bilix, p. 578). 



" Endoceras proteiforme Hall" (p. 579). Not seen by the 

 writer. 



" Orthoceras laqueatumV, p. 579. Too poor and frag- 

 mentary to make out even the genus. 



Conularia trentonensis Hall, p. 578. A small fragment of 

 a Conularia is present. 



Triarthrus becJcii Green. Common in fragments. It is prob- 

 able that the Collingwood T. maghificits Twenhofel is also 

 present (the tails are labeled Calymene senaria by Emer- 

 son, p. 582). 



Cyphaspis (?) froblsheri Emerson, p. 583, fig. 11. Based on 

 a free cheek ; the genus is not determinable. 



Ampyx ? (Emerson's trilobite sp., p. 583, fig. 10). 



Leperditia alta (Conrad). This is not Conrad's Silurian 

 species but appears to be a new form of Leperditia. 



This horizon, on the basis of the above fossils and the further 

 fact that Basilicas canadensis (=Asaphus canadensis Chap- 

 man) occurs not far to the south at Cape Chidley, Labrador, 

 seems to correlate with the Collingwood formation of Ontario. 

 The same black shale is also present at Countess Warwick 

 Sound, Blunt Peninsula, and probably as well at the head of 

 Frobisher Bay. 



3. Silxjriais". Gray, fine-grained dolomites of Rescue Harbor, 



Cyrus Field Bay, have Orthis cf. davidsoni, Ualysites 

 catenularia, and a pentamerid, probably the same as the 

 next species. Further west in Frobisher Bay in the iden- 

 tical dolomite occurs Conchidium nysius tenuicostatum 

 (Hall), a form first described from the Falls of the Ohio. 

 The Cyathophyllum pickthorni identified by Emerson 

 (p. 577) are too poor to determine. 



This horizon is well up in the Silurian, probably in the 

 lower Lockport, and about the horizon of the Louisville as 

 developed at Louisville, Kentucky. 



