prosser.] ULSTER AND DELAWARE R. R. SECTION. 59 
third branches is about 5£ cm.; and between the third and fourth and, 
the fourth and fifth is 4J cm. The stipes near the base are 2 mm. in 
width. The upper part of some of the stipes, where the coaly material 
is not completely gone, shows the leaf scars and also the longitudinal 
ridges. At the bottom of the slab is a piece of the rhizoma to which 
one of the stipes is attached. On the upper and longer side, it is 4 cm. 
in length, and the width is 6* mm. On the rhizoma a little below the 
origin of the stipe is a circular marking which may be an areole. This 
is the best specimen of Psilophyton prineeps Dn. yet seen from the 
Hamilton of New York. Dr. Dawson stated in the specific description 
that the stems were " covered with interrupted ridges," ] and this char- 
acter is very clearly shown on specimens sent me by Dr. Dawson from 
the Lower Devonian of Campbellton, New Brunswick; but on most of 
the New York specimens this character is not very distinct and some 
of the stipes are nearly smooth. However, some of the specimens 
from the Lawson quarry are clearly ridged, though not quite so strongly 
as the Canadian specimen. A number of these specimens resemble 
quite closely the plant figured by Vanuxem 2 from west of North New 
Berlin (now New Berlin), Chenango County, and consequently in the 
upper part of the Hamilton stage, which was published by Prof. Hall 
as P. prineeps? 
In the State Museum at Albany is a specimen labeled Hamilton, 
North New Berlin, N. Y., which may be one of those collected by Van- 
uxem. The specimen has a rather large stem, with one branch from 
which a number of small branchlets arise. This specimen is very sim- 
ilar to, though somewhat smaller than, those collected by myself at 
Skunnemunk Mountain, Orange County, West Hurley, Ulster County, 
and Haines Falls, Greene County, N. Y. In the collection of the Ameri- 
can Museum of Natural History, Central Park, New York, is a large 
branched stem labeled " Psilophyton prineeps Dn. Schoharie County, 
N. Y." 
In addition to the species already mentioned, specimens of a large 
and interesting fossil plant were obtained, which on study proved dif- 
ficult of identification, Sir William Dawson, upon examination of these 
specimens, decided that they had not been described. Prof. Penh al- 
low also regarded them as new, and named and described the species 
as Psilophyton grandis. 4 
No. 1487 D. — Garry ledge. These quarries are 2 miles north of West 
Hurley with exposures in places of 12 feet of blue stone, part of which 
is flagging, covered with nearly 15 feet of reddish and greenish argil- 
laceous shales, some of which are arenaceous. In the shale are fossil 
plants, probably Psilophyton, but they are not clearly preserved. The 
iPoas. n. Dev. and Up. Sil., Pt. I, p. 37. 
*Geol. N. Y., Pt, nr, p. 161, fig. 40. 
^Sixteenth logouts' Kept, on State Cab. Nat. Hist., 1863, p. 110. Vanuxem' s figure is reproduced 
on p. Ill, fig. 2. 
♦Proc. U. S. National Museum, vol. XVI, pp. 111-113, PI, XII, tig. 12a ; PI. xm, tig. 12b ; PI. xiv, fig. 12c. 
