Faunal Provinces of America. — Schuchert. 155 
through Boothia, Prince of Wales Land and North Somerset. 
Continuing northward we again find pre-Cambrian along the 
western side of Grinnell Land. All that we know of the De- 
vonic of this eastern Arctic area is the Middle Devonic along 
the southwestern margin of Hudson's Bay, extending, as stat- 
ed by Bell, under the waters of the bay and possibly uniting 
with the outcrop on Southampton Island at the north end of 
the bay. Then for more than thirteen hundred miles north- 
ward the youngest rocks are Siluric until, at Cape Frazer and 
Cape Leidy (between lat. 8o°-8i° N., long. 70 W.), an un- 
mistakable Helderbergian tauna was collected by Kane. In 
about the same region at Ravine, Dana bay, occur other De- 
vonic fossils recalling rather the Oriskanian than the Middle 
Devonic. West of Boothia for seven hundred miles no De- 
vonic is known until in the region of Cape Parry and Baring 
Island in Prince of Wales Strait. These deposits in all prob- 
ability belong with the Eurasiatic fauna and are the northern 
limits of the formations in the Mackenzie valley and the Arc- 
tic coast of Alaska. 
The writer will add here that, according to Suess, Davis 
strait did not originate until Cretaceous time. During much of, 
if not all of Paleozoic time, Laurentia was connected with At- 
lantis* and together they embraced what is now Quebec. Un- 
gava, Labrador, Baffin Land, Davis Strait and Greenland. 
It now devolves on the writer to point out the probable 
path of migration of the Middle Devonic into the Hudson Bay 
country. It has been stated in previous pages that the Missis- 
sippian sea was in communication with a southern ocean ex- 
tending into Brazil and that the Middle Devonic of the two 
very widely separated areas has an identical faunal facies. 
Further, it was stated that in the Connecticut trough about 
Lake Memphremagog there is an unmistakable Onondaga 
fauna. The truth of the latter statement is proved by such 
species as Syringopora hisingcri, Cladopora labiosa, Stroph- 
eodonta inequiradiata, S. perplana, Atrypa reticularis, A. 
spinosa and Conocardium cuncits trigonale, which occurred in 
a collection made at Owl's Head by C. H. Hitchcock and re- 
cently determined for him by the writer. In Quebec on the 
Chaudiere, midway between Famine river and the village of 
* Sdess, Aath'tz der Erde, ii, 1888. 
