468 C. Schuchert — Notes on Arctic Paleozoic Fossils. 



Northernmost Labrador, Cape Chidley. 



Doctor A. P. Low spent the greater part of the years 1903- 

 1904 in the Hudson Bay country and the Arctic islands. 

 "While at the trading post of Port Burwell, which is just 

 around from Cape Chidley in Ungava Bay, Low made an in- 

 teresting collection of fossils from drift pieces of limestone 

 that he thought had been brought there by the ice from 

 Akpatok Island, many miles to the west. Among these fossils 

 are unmistakable Helderbergian species, and as such are 

 unknown on Akpatok it is a question whether this island is the 

 source of these loose limestones. They may be rather from 

 the north and from not far away, on Baffin Island. 



The fossils of Cape Chidley represent three distinct hori- 

 zons, as follows : 



1. Ordovician. From dark gray limestones. 



Labyrinthites chidlensis Lambe. A coral suggesting Haly- 

 sites, and referred by Lambe to the Halysitidse. The 

 writer did not see the material. (Described by Lambe in 

 Low 1906: 327.) 



Orthoceras, sp. undet. In form like Ormoceras tenuifilum 

 but with a small siphuncle about 0*25 inch in diameter 

 at the septa. 



Endoceras cf. annulatum Hall. A more slender form than 

 E. annulatum, and with a smaller apical angle. 



Endoceras, sp. undet. In shape like the last one, but with- 

 out annulations. 



Spyroceras cf. vertebrale (Hall). The annulations are about 

 as numerous as in Hall's figures (Pal. N. Y., I) but less 

 abruptly arched. The siphuncle does not show. 



Plectoceras cf. jason (Billings). Ami labels this P. obscurum 

 Hyatt ?. It differs from Ruedemann's description of 

 P. jason (Bull. 90, N. Y. State Mus. : 484) in that the 

 siphuncle is smaller, but chiefly in that the living chamber 

 occupies three-fourths of the last volution, instead of " less 

 than one-half volution." Diameter of shell 8*5 inches. A 

 large and fine fossil. 



Eurystomites, n. sp. Ami labeled this E. undatus Emmons, 

 to which group of Eurystomites it undoubtedly belongs. 

 It attains, however, a larger growth, has a very wide 

 dorsum and a shallow hyponotnic sinus. It is a fine 

 specimen with a diameter of 6*5 inches. 



These cephalopods, as they all appear to occur together, 

 indicate the lower part of the Black River formation as 

 developed at Watertown, New York. It is probable that this 

 horizon is also exposed on Akpatok Island in Ungava Bay. 



