26 PAKALLELISM OF THE QUEBEC GROUP. 



wliat from the formations elsewhere, and besides are almost desti- 

 tute of fossils. They certainly underlie the Black River. 

 The only species identified in these beds are Ptilodictya 

 fenestrate Orthis platys and Am'pyx Halli. The first two of 

 these are good Chazy species, in the typical localities, but the 

 last is not ; and I may mention here that no species of Ampyx 

 has yet been found in the north-western region of our palaeozoic 

 basin, but I know of four or five in the south-eastern ; all, either 

 in the Chazy, or in the Quebec group, except one at Gaspe, which 

 occurs in slates the age of which is not determined. One of the 

 species occurs in Tennessee in the upper strata of Safford's for- 

 mation 3 (most probably Chazy), and the others at various places 

 in Vermont, Canada East and Newfoundland. The distance from 

 Highgate Springs, in a straight line, to the village of Chazy the 

 typical locality of the formation, is about seventeen miles in a 

 westerly direction. Chazy limestone is said to occur on Isle 

 La Motte, in Lake Champlain about twelve miles south-west of 

 Highgate Springs. -It would require a great deal of further examina- 

 tion of the locality at Highgate Springs in order to determine pos- 

 itively whether the true Chazy exists there, and if it do, what is 

 the difference, in the grouping of the fossils between that and 

 the typical locality, that might be due to geographical distribution. 

 Within two miles east of the exposure of Trenton and Black Ri- 

 ver limestone at Highgate Springs, we come to a large tract of 

 limestone, of the Quebec group, which extends north to Bedford, 

 a distance of about ten miles with a width of two miles at Phil- 

 lipsburgh. A great many fossils occur in this tract of limestone, 

 but not one of them has yet been identified as a Black River or 

 Trenton form, and yet these two formations with a considerable 

 number of their peculiar and characteristic species are exposed 

 within two miles. Here then, as at Quebec, the theory of distinct 

 zoological provinces will not explain the dillerence between the 

 fauna of the Quebec group, and that of the Trenton and Black 

 River. 



The above is intended to show, that the Quebec group is not of 

 the age of the Trenton, and that its upper limit cannot be higher 

 than the base of the Black River. It is useless to compare it 

 with the Hudson River, or any other higher formation. I think, 

 however, that it must come very near the Black River, and, in 

 describing the new species from Phillipsburgh, I have (in giving 

 the locality and formation at the end of each description) referred 



