474 0. Schuchert — Notes on Arctic Paleozoic Fossils. 



Clorinda, n. sp. A very large form with relationship nearest 

 to C. barrandei, but larger and less plicate. 



Strophonella euglypha (Dalraan) ?. 



Actinoceras, said to be A. keeioatinense Whiteaves. Very 

 large annulate siphuncles, completely filled with deposits 

 of lime, up to 1*5 inches in diameter. Very much like but 

 larger than the siphuncles of A. infelix of the Silurian of 

 Anticosti Island. 



These fossils are clearly from the Silurian and the majority 

 of species are indicative of a horizon of about Clinton time, as 

 developed on Anticosti Island. 



Winter Harbor, south side of Melville Island. 



Ordovician. — McMillan, with Captain Bernier on the latter's 

 expedition to the Arctic islands and Hudson Strait in 1908- 

 1909, found in a drift piece of limestone a very large Tripter- 

 oceras that originally had a length of one foot. Forms similar 

 to this occur in the Trenton of Iowa, Minnesota and Manitoba. 

 The horizon and faunal realm appear to be in harmony with those 

 of the Galena-Trenton of Iowa and Minnesota. It is unfortu- 

 nate that this interesting fossil has no direct stratigraphic value 

 because of its drifted source on an island whose native rocks 

 are of Carboniferous age. For other details see Lambe in 

 Bernier 1910 : 485. 



Beechey Island, southwestern corner of North Devon Island. 



Lower Devonian. — At Cuming Creek in the center of the 

 southern shore of North Devon Island, Low states that the 

 Archean gneisses are unconformable overlain by horizontal 

 formations consisting of " red and purple arenaceous shales and 

 thin-bedded sandstones having an aggregate thickness of fifty 

 to one hundred feet. These in turn were succeeded by beds 

 of impure limestone of light gray or creamy color. The beds 

 are usually under two feet in thickness, and separated by 

 thinner beds containing a considerable amount of clay. These 

 light-colored limestones have a thickness of over 1000 feet in 

 the cliffs on both sides of the creek. . . . Fossils are only 

 found in the beds immediately overlying the dark shales and 

 sandstones of the base. " The limestone cliffs rise above the 

 sea up to 1200 feet. Farther inland they rise in steps to nearly 

 2000 feet. 



" Similar conditions prevail in the cliffs at Beechey Island 

 [at the southwestern corner of North Devon Island], where a 

 large collection of fossils was obtained from the lower lime- 

 stone beds, while others, picked up loose, but evidently fallen 

 from the cliffs above, showed that the upper beds passed close 

 to if not into the Devonian. 





