360 Tin American Geologist. June, i89i 
Tom's creek, Blaeksburg and Price's mountain mines in Mont- 
goineiy county, Ya. , and believes that important consequences 
will follow a thorough stud}' of all the specimens. This is the 
first good collection of plants from these otherwise extraordinary 
coal beds of the Pocono formation No. X. The few which I ob- 
tained thirty-five years ago at Tom's creek were enough to show 
Lesquereux that the}' were rightly placed beneath the red shale of 
XI The flora as a whole is nearer Devonian than Carbon- 
iferous in type .... Those Montgomery county boxes which Mr, 
Lacoe opened show a complete absence of Carboniferous forms. "* 
There still remain for consideration the famous plant-bearing 
beds at Perry, Maine, which have yielded a larger number of 
species of fossil plants than has yet been described from the 
Catskill of N. Y. and Penn'a. The geological position of this 
flora has long been in question, but the latest reference brings it 
within the scope of this paper. Sir William Dawson described the 
flora and considered it as probably Upper Devonian, t an opinion 
that is stated by the author in later publications without qualifi- 
cation. % On the geological maps of the Canadian survey it was 
colored as Lower Carboniferous and said by Baile}' and Matthew 
to be "a group of beds lying at or near the base of the Lower 
Carboniferous series, and characterized by an Upper Devonian 
flora. "§ While more recently professor Baile}' has referred it to 
the Devonian and stated that it most nearly resembles the Catskill 
of New York. 1 
Nineteen species of fossil plants have been described from 
Perry, Maine ; the list being as follows : 
1. Anarihrocama perryana Dn. 10. Lepidostrobus globosus Dn. 
2. Arcfueopteris jacksoni Dn. 2 11. Leptophloeum rhombicum Dn. 
*2d Geol. Surv. Penn'a. P 4 , Vol. Ill, 1890, Critical Emendations, p. 
XIII. Note. 
fCan. Nat. and Geol.. Vol. VI. 1861, pp. 172-175: Quart, Jour. Geol. 
Soc. London, Vol. XVIII, 1862, p. 396, etc : Ibid., Vol. XIX, 1863, pp. 
158-465. 
JGeol. Surv. Canada. Fos. Plants Erian and Up. Sil, Pt. II. 1882, p. 
97; The Geological History of Plants, 1888, p. 107. 
§Geol. Surv. Canada. Rep't. of Progress for 1870-71, p. 200. 
iProc. and Trans. Royal Soc. Canada for 1889, Vol. VII, 1890, Sec, IV, 
]>. 60. 
2 Sphenopteris hitchcockiana Dn. is here considered as a synonym of 
.1. jacksoni Dn. The reasons for this reference are as follows: In 1869 
Schimper wrote "Le Sphenopteris hitchcockiana de Dawson iepresente 
evidemment la fructification de cette espece [Cyclopteris jacksoni]" 
(Traitr pal. veg., Vol. I, p. 478.) Dawson in 1871 considered this state- 
ment and said " Schimper suggests that my Sphenopteris hitchcockiana 
