4 PENNSYLVANIA AND NEW YORK DEVONIAN. [bull. 120. 
Down the ridge, toward the iron bridge, across the creek, opposite 
Elizabeth street, as well as at the point where the highway tnrns 
down the creek, is a ledge of the cherty Upper Helderberg (Cornifer- 
ous) limestone containing corals and a few other fossils. 
No. 1475 B 2— Bluish gray shales occur in McMichaePs Creek, oppo- 
site Elizabeth street, the dip of which is between 25° and 30°, one clear 
stratum giving 27° to 28°, 20° or more west of north. The cleavage is 
to the south rather than to the southeast. 1 These shales are the transi- 
tion from the Corniferoas limestone up into the black Marcellus, and 
at this point 45 feet are exposed. No fossils were found. 
No. 1475 B 1.— At the northeast end of the small ridge which rises a 
little north of Scott street, Stroud sburg, is an outcrop of blackish shales. 2 
The ridge extends northeast and southwest, and is probably produced 
by one of the small folds. The rock has the lithologic character of the 
Marcellus shale of New York, and the fossils given below show this 
correlation to be correct. Fossils are comparatively abundant in this 
locality, and it is one of the few places which has yielded Marcellus 
fossils in northeastern Pennsylvania. Prof. White stated that this is 
the only locality at which he found fossils abundant in the Marcellus," 3 
and he provisionally identified the following genera : "Spirifer, Chonetes, 
ProductuSy Ortlris, with many crinoidal fragments." 4 
Of course the Chonetesis the G. mucronata and the Orthis is probably 
Leiorhynchus Umitaris; but the forms called Spirifer 5 and Productus are 
not so easily referred to their proper systematic position. 
Fauna of No. 1475 B 1. 
Leiorhynchus limitaris (Van.) Hall (aa 5 ) 
Chonetes mucronata Hall (aa) 
Leiopteria lsevis Hall (a) 
Styliola fissurella Hall (c) 
Orthoceras subulatum Hall ( ? 7 ) - -.. (r) 
Pterinopecten dignatus Hall. (rr) 
( ?) Goniatites sp., crushed and imperfect fragment (rr) 
] See G 6 . p. 269. In describing this locality Prof. White mentions "thin bands (3 to 5 inches thick) 
of alight drab colored rock," which is interstratified with the bluish gray shale at intervals of 3 to 
5 feet. These bands are thin layers of limestone, showing the drab color only on the weathered 
surface. 
''This is the outcrop mentioned by Prof. White, on pp. 115, 116, 270 of G- G , and at the last reference 
we find this statement: "It has been quarried to some extent for riprap for the roads." 
: G 6 , p. 115. 
4 Op. cit., p. 116. 
6 Prof. White stated: "Spirifer umbonatus was not recognized anywhere in the district (G 6 , p. 
116), and Prof. Lesley, in commenting on the above fossils of Stroudsburg, said; "Spirifera (Ambo- 
ccelia) timbonata, the little shell so extremely abundant in western New York, was not seen by Prof. 
White anywhere between the Delaware and Schuylkill rivers." (Sum. Desc. Geol. Penn., Vol. ii, p. 
1206, f. n. f). By referring to the lists of Hamilton fossils in this paper, it will be seen that Ambocoelia 
umbonata (Con.) Hall, is a common species in northeastern Pennsylvania. It is second in abundance 
in the exposure a short distance above Gravel Place, 2J miles above Stroudsburg. 
c The following characters are used to indicate the abundance of the species : aa = very abundant, 
a = abundant; cc = very common, c — common; rr = very rare, r = rare. 
7 (?) following the name of a species indicates that the specific identification is in doubt; (?) pre- 
ceding the generic name indicates that the generic identification is doubtful. 
