358 The American Geologist. June, 1891 
Four species, A. hibernica (Forbes) Lx. , A. minor Lx. , A. ob- 
tusa Lx. , and A. rogersi (Da.) Lx. , are known to occur in the 
Pocono or Subconglomerate of the Lower Carboniferous. A. 
sphenophyllifolia Lx. , has been found in the Lower Catskill of 
Meshoppen, Penn'a. , and A. macilenta Lx. is from Meshoppen 
and the Catskill of the D. L. and W. R. R, tunnel, north of Fac- 
toryville, Penn'a. Of the remaining six species Psilophyton prin- 
cess Dn. is known in the Hamilton and Chemung of New York* 
and is reported as low as the Upper Silurian of Canada ; while 
Rhacophyllum truncation Lx. is stated by its author to occur in 
the Subconglomerate of Tennessee, t Dendrophycus desorii Lx. 
occurs in the Subconglomerate of Penn'a. , and in Iowa in a clay 
that is stated by professor Barris to belong to the Coal Measures, t 
Cyclopteris valida Dn. occurs in the Middle Devonian of St. John, 
N. B. \l Lycopodites richardsoni Dn. , is in the probable Catskill 
*Prof. I. C. White found "vegetable fragments which resemble 
Psilophyton princcps Dn." in the Upper Chemung, near Danville Sta- 
tion, Montour Co., Penn'a. (2d Geol. Surv. Penn'a. G 7 , p. 307). 
fThis species was first given by Lesquereux as from the "red 
shale of the Vespertine on the bluffs of the Susquehanna river above 
Pittston " (2d Geol. Surv. Penn'a. P, Coal Flora, Vol. I, p. 312 ). While 
in Vol. Ill, p. 850 it was stated to occur in the Catskill of Cotton Nar- 
rows, Penn'a ; but was not mentioned under the Pocono or Subconglom- 
erate of Penn'a. Mr. Lacoe wrote, February 19th, that "Rhaco- 
phyllurn truncatum has been found at but one place [in Penn'a.] and 
that is in the Catskill as placed in the Table in P. Vol. Ill, and G 7 , pp. 
60, 61, where Prof. White mentions the A. minor in No. 20 of the Coxton 
section. Prof. Lesquereux was misled by the thinning out of the Po- 
cono northward, when the table in Coal Flora, Vol. II was made, and 
the habitat of R. truncatum given, on p. 312, Vol. I, as Vespertine." 
JProc. Davenport Acad. Nat. Sci., Vol. Ill, Pt. II, 1882, diagram on 
p. 164 and pp. 166, 168. 
There appears to be no evidence in support of Lesquereux's statement 
that this species occurs in the Devonian of Iowa. (See, 2d Geol. Surv. 
Penn'a. P, Vol. Ill, p. 701 ; and, Ibid., An. Rep't for 1886. Pt. I, 1887, 
p. 462 ). 
§Prof. Fontaine stated that " Cyclopteris valida is common" at Lewis 
Tunnel (Am. Jour. Sci., 3d ser., Vol. VII, 1874, p. 578); but,in 1880, it 
was not positively identified, the reference being that ••More rarely we 
find a Xcuropteris allied to V. flexuosa, but, if not identical with it, a 
plant allied to Dawson's Cyclopteris valida ( 2d Geol. Surv. Penn'a. 
P 2 , p. 7 ). In the above reference it is not quite clear whether one or 
two species are meant : but, Prof. Fontaine's letter shows that two 
species were under consideration. The professor writes ••With refer- 
ence to Cyclopteris valida, I would say that the plant found at Lewis 
Tunnel, and supposed to be it, did not yield a sufficient amount of ma- 
terial to render its identification positive. This must then be left as a 
doubtful C. valida Put there is one correction that I would make 
[in reference to the account of the Vespertine flora in P 2 .] At the top 
of p. 7, it is stated that there is found at Lewis Tunnel a Neuropteris 
allied to V. -flexuosa. This I have found to be a form of Archseopterte 
hibernica." 
