1892. ] NEW YORK ACADEMY OF SCIENCES. 139 
regular bifurcating impressions, probably aérial roots of a calamite 
or fern. 
Fossil wood was also found near this ledge which was apparently 
contained in a concretion and called the ‘‘fossil trees” by Mr. 
Cooley. The specimen obtained from this locality has been studied 
by Professor F. H. Knowlton, Assistant Paleontologist of the U. 
S. Geological Survey, and he identifies it as Celluluxylon prime- 
vum Dn. 
Since neither the geographic distribution nor the geologic range 
of the two species identified from this locality is considerable, it 
may be valuable for the purpose of correlation to cite all those 
references which furnish data bearing upon these two points. 
Psilophyton princeps was described by Dawson in the Quart. 
Jour. Geol. Soc., London, vol. xv, Pt. I, 1859. The genus was 
described on p. 478; figs. la—-li were given on p. 479, li being a 
restoration, and sections of stems figs. 1k-In, p. 480; while the 
specific name was proposed on p. 481. The specimens were reported 
from the lower or middle Devonian of Gaspé, Lower Canada. In 
this paper, on p. 482, Dr. Dawson mentions fossil plants previously 
described that may belong to this species. First is the plant figured ~ 
by Vanuxem in 1842 (Geol. New York, Pt. III, p. 161), from a 
quarry west of North New Berlin [now New Berlin], Chenango 
County, New York, which is in the upper part of the Hamilton. 
‘‘ Dichotomous roots: from Orkney and Caithness,’? described by 
Salter, and ‘“‘bifurcating plants with curved tendrils like branchlets 
figured by Hugh Miller’ from the Old Red Sandstone of Scotland, 
are considered as belonging to this genus. Also, Haliserites 
Dechenianus Gopp., in the Lower Devonian of Rhenish Prussia, 
is considered a plant of this genus (op. cit., p. 483). 
Dawson, Canadian Nat. and Geol., vol. vi, June, 1861, p. 175, 
reported the species from Perry, Maine, and on p. 179 doubtfully 
from St. John, N. B. 
Dawson, Quart. Jour. Geol. Soc., vol. xviii, 1862, pp. 298, 315, 
326, gives a more complete account of the range and distribution of 
the species. On p. 315 it is stated that the species is characteristic 
of the whole Devonian system at Gaspé, and ‘fragments which 
may have belonged to it occur in the Upper Silurian.” It is also 
mentioned from Perry, Maine, which, in the table on p. 326, is 
called Upper Devonian; from the Hamilton at Schoharie, N. Y., 
and Akron, Ohio (Professor Hall, 16th An. Rept. Regents Univ. 
State N. Y. on Cond. State Cab. Nat. Hist., Appendix D, 1863, p. 
108, foot-note, states that ‘‘The beds at Akron are of the age of 
the Chemung, of New York, or the Waverly sandstone of Ohio’’), 
and from what is called the Chemung at Cascade Falls. [It is not 
stated whether Cascade Falls is in Ohio or New York, and the 
locality seems to have been lost. Dr. J. M. Clarke writes me that 
“The locality of ‘Cascade Falls’ is unknown to both Professor 
Hall and myself.” While Sir Wm. Dawson says, ‘‘I am afraid I 
cannot be sure of the locality of the specimens from Cascade Falls, 
