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BULLETIN OF THE NATURAL HISTORY SOCIETY 
otherwise very difficult to explain, and also the reason for the 
peculiar northeast direction of parts of the Bartibog, Tabusintac, 
Portage River and Little Tracadie, and for the curious course of 
the Caraquet parallel with the coast of Bay Chaleur. The correct 
linking of the valleys east and west of the New Eastern water- 
shed is rendered very difficult by the changes which have been 
brought about by the considerable height of that watershed (at 
least 535 feet by railway levels), and also by subsequent changes, 
in part glacial, in the courses of the Pokemouche, Tmcadie (Note 
94) and Tabusintac valleys. The lower courses of these streams, 
no doubt following the slope of the syncline trough forming 
Miramichi Bay, have been swung directly eastward across the 
low ridges separating the ancient valleys (compare Note 94). 
All of the intervening ridges can be traced near the sea; — thus the 
Tuadookian-Tabusintian ridge shows in the elevation east of 
Portage River; the Tabus intian-Tracadian in the elevated ridge 
on which Tracadie Village and its church now stand; the 
Tracadian-Pokemouchian, the highest and most important of all, 
extends out to form Shippegan and Miscou in one direction, and 
southwesterly to cross the Minaquan valley near Chaplins Island, 
causing there the wide separation of the mouths of the North- 
west Miramichi and the Sevogle ; the Pokemouchian-Caraquetian 
comes to the sea in the cliffs of Caraqivt; and the Caraquetian- 
Nepisiguitian (the latter mentioned below) in the cliffs at Grande 
Anse. 
We consider finally the fourth group of these Northumbrian 
Rivers, including the small rivers north of the Nepisiguit to Bay 
Chaleur. Though short, they all show the right-angled bends on 
their issuance from the crystalline highlands, followed by a 
northeasterly course showing a certain homology with the valleys 
to the south of them. Then in their lower courses they are 
swung northward into Bay Chaleur, by the same causes which 
turned the rivers to the southward into the Minaqua valley, 
namely the elevation of the New Eastern Watershed immediately 
on the east. The recognizable valleys are the following ; — 
16. J'he Ncpisiguitian Valley. Headed probably tin or near? 44-mile 
Brook, and followed the general course of the present Nepisiguit to below 
