J. W. Dawson on the Flora of the Devonian Period. 311 
appears in Eastern America. Such gaps are usually local and 
bridged over somewhere. In the West there may bea transition, 
4s would indeed seem probable from the Ohio plants mentioned 
above, in connection with the peculiarities of the physical geol- 
°gy; but in this case I should not suppose these beds of pas- 
Sage to be precisely equivalent in age to the Chemung group, 
but rather to be newer, and possibly wanting or represented by 
tren deposits in New York. 
If such intermediate or passage beds exist in the West, and if 
their plants have not been already collected and studied by Dr. 
Newberry or Mr, Lesquereux, it would be very important that 
a 
fe. 
4 
i 
Sy 
a 
: 
m, 
= 
: 
uv 
the, be supposed to connect. I may add that, for this purpose, 
* Most unpromising fragments, especially if capable of showing 
——— 
Arr. XXXT.— On the Flora of the Devonian Period in Northeastern 
eae ; by J. W. Dawson, LL.D., F.R.S., Principal of 
eGill University, Montreal.! 
eg paper by Prof. Dawson is the one alluded to in his pre- 
~ Communication. The 2d part containing descriptions of 
Species is omitted. ] " 
The existence of several species of land-plants in the Devo- 
han rocks of New York and Pennsylvania was ascertained 
_ Gany years ago by the Geological Surveys of those States, and 
Several of these plants have been described and figured in their 
_ > “ports.* Tn Canada, Sir W. E. Logan had ascertained, as early 
t 
yO in the ‘Proceedings’ of this Society.’ More recently 
a Messrs Matthew and Hartt, two young geologists of St. John, 
_ ew Brunswick, have found a rich an interesting flora in the 
foau;metamorphic beds in the vicinity of that city, in which a few 
sil plants had previously been observed by Dr. Gesner, Dr. 
. 
Copied from the Quarterly Journal of the Geological Society, Nov., 1861. 
; ~ and rsead ny ian the é eology of 2 New York; Rogers, Report on 
sie: Vania. 
* Quart. Jour. Geol. Soe. Lond., xv, 47 
a 
