Geological position of the CatsJcill group. — Prosser. 357 
bodies which Prof. Clay pole suggests are spores of plants "from 
above Coxton, Lackawanna Co., Penn'a. * Professor Lesquereux 
identified a Lepidocystis, species undeterminable, from Meshoppen, 
Penn'a. f 
One of the seven species of Archceopteri's, A minor Lx. , has 
been identified by George B. Simpson from the Chemung at 
Roulette, Potter Co., Penn'a. ;t while A ohtusa Lx. is reported 
by Dr. Dawson from the Upper Devonian of New Brunswick under 
the name of Cyclopteris ohtusa (Lx. ) Dn. I Archceojyteris jacksoni 
Dn. occurs in the Middle Devonian of St. John, N. B. , the Upper 
Devonian of Scaumenac bay, Lower Quebec, and at Perry, Maine. || 
*IMd„ G 7 , p. 61 ; also, see p. 58. 
\lhid., O 3 , Cat. Geol. Mus., Pt. Ill, 1889, p. 116. 
%lbid., p. 248. Sherwood in his report on "the Geology of Potter 
County" mentions the occurrence of plant stems in the Chemung gray 
shale at this locality and says that "The Carboniferous stems of reed- 
like plants, in particular, are quite numerous "(Ibid., G 3 , p. 30.) Prof. 
Lesquereux identified a specimen said to have been found at Towanda, 
Penn'a. as belonging to the above species (Proc. IT. S. Nat. Mus. .Vol. X, 
p. 24). The specimen is marked "Towanda Pa., from a boulder" and 
it is not stated whether from the Chemung or Catskill. If it came from 
the sandstone outcrops near Towanda it would belong to rocks that 
have been considered as Chemung. See the geological map of Bradford 
Co., by Ajidrew Sherwood, and in the accompanying report it is stated 
that "opposite and a little above Towanda, there is an extensive out- 
crop [of Towanda sandstone]. .. .containing carbonized stems of reed- 
like plants " (2d Geol. Surv. Penn'a. G, p. 38). While in 1885 Prof. 
Lesley wrote that " opposite Towanda is an outcrop of Chemung sand- 
stone 300 feet thick crowded with carbonized plant steins" (Ibid., X, 
p. XXVIII). 
§Geol. Surv. Canada. Fos. Plants Erian and Up. Sil. Pt.II, p. 100. 
|| In 1874 Prof. Fontaine reported this species from the "Great Con- 
glomerate " of New river, near Sewell Station, West Virginia ( Am. 
Jour. Sci., 3d ser., Vol. VII, p. 57); and also from what he then con- 
sidered Catskill shales, but later changed to Vespertine, at Lewis Tun- 
nel (Ibid., p. 578 ). Two years later he mentioned its rare occurrence 
in the "Conglomerate Series" of West Virginia under the generic name 
of Palseopteris, but stated that "Only one or two small fragments of 
this plant were found at Sewell Station with coal ( .i *' (Ibid.. Vol. XI. 
1876, p. 383). It is there stated that the specimens from Lewis Tunnel 
are not identical with A. jacksoni as will be seen from the following 
paragraph of the article: "1 may state here that the PalceopteHs jack- 
soni of the Conglomerate series, is the typical plant, and very different 
from the plant found at Lewis Tunnel, and given in my previous paper 
as P. jacksoni. I have additional specimens from Lewis Tunnel, which 
show without doubt that, as professor Andrews has suggested, this lat- 
ter is a new species " ( Ibid., p. 384 ). In 18*0 u was stated by Fontaine 
and White, in enumerating the flora of the Conglomerate group of New 
river, that "we find a small Archteopteris, very near to Dawson's Cy- 
clopteris jacksoni" (2d Geol. Surv. Penn'a. P 8 , p. 12). In explanation 
of tin; above references professor Fontaine wrote me. March 8th, L891, 
as follows: "Only one specimen was found at Sewell Station and it did 
nol show much of the plant. My opinion now is that it was not sulli- 
cient to determine positively the fossil as Archceopteris jurist, Hi. It 
must be regarded as of doubtful position." 
