14 PENNSYLVANIA AND NEW YORK DEVONIAN. [bull. 120. 
remains are of very rare occurrence, the only locality in the district 
where any determinable forms were seen being a short distance»below 
Henryville in a cut on the Delaware, Lackawanna and Western Kail- 
road. There, near the base of the Montrose red shale, great numbers 
of Archceopleris Jacksoni occur." 1 
Careful search failed to reveal a fragment of an Archcvopteris, and 
the only fossils seen were the irregular fucoidal ( !) markings that are 
frequently found in the red shales of the Upper Devonian. 
No. 1475 Fl. — Near the southern end of the second, ulroad cut north 
of Henry ville, in green argillaceous shale, just on top of red shale, a 
fragment of a brachiopod shell was found. At the northern end of the 
cut, in greenish, somewhat arenaceous shales, 1J feet above red shale, 
are fossils. The cut shows one of the small rolls that were frequently 
noticed along the line of the railway. These rocks are probably in the 
formation called "the Honesdale sandstones" by Prof. White, although 
near the transition from them to the underlying Montrose shale. Above 
this horizon no fossils were seen in the higher rocks, except indeter- 
minable fragments of plants, and this is the highest fauna that has yet 
been found in Monroe and Pike Counties. 
Fauna of No. 1475 Fl. 
Spirifera mesacostalis Hall. 
Ten specimens, part of them broken, from a thin layer of greenish, moderately 
arenaceous shale. It is the only fossiliferous stratum seen in these heels. 
Five specimens in good condition were found, so there is no doubt as to their 
specific identification. 
Leda diversa Hall ( ?). 
Possibly the specimen is L. brevirostris Hall, since it is not so long as the typ- 
ical L. diversa, but on the contrary it is not so high as the typical L. brevi- 
rostris. 
Spirifera mesastrialis, which is reported from the Hamilton of Scho- 
harie County, N. Y., 2 is an abundant and well-known species of the 
middle zone of the a Ithaca group" at Ithaca, and is also found in the 
lower Chemung, farther south in southern central New York, :{ and 
northern Pennsylvania, 4 while Leda diversa is a Hamilton species of 
eastern and central New York. The fossils seem to indicate that these 
shales are hardly younger than the lower Chemung and they might be 
still older, since the specimens of Spirifera mesastrialis do not appear 
to be the variety which is found in the lower Chemung of southern New 
York; but, on the contrary, the form found in the older rocks of the 
Portage. 
The nearest correlation to the above is that of Prof. Stevenson in his 
vice-presidential address before Section E of the American Associa- 
tion, in 1891, when he drew the line separating the Catskill from the 
1 G 6 , p. 103. 
2 Geol. Survey N. Y., Palaeontology, Vol. IV, Pt. I, p. 417. 
3 Bull. U. S. Geol. Surv., No. 3, pp. 17, 22, 24. 
* Proc. Am. Asso. Adv. Science, Vol. XXXIV, p. 231. 
