20 PENNSYLVANIA AND NEW YORK DEVONIAN. [bull. 120. 
as the one generally called the Tally limestone by the Pennsylvania 
geologists. 
The above description of the Lehigh section shows that there is no 
more evidence in favor of the correlation of this argillaceous zone of the 
Hamilton stage with the Genesee stage of New York than was found 
for the same zone in Pike and Monroe counties and southeastern New 
York. The fossils are not Genesee but Hamilton species, and, more- 
over, the lithologic characters are not those of the Genesee shale, but 
those of the black argillaceous zones of the Hamilton, as, for instance, 
the Moscow shale immediately below the Tully limestone. After mak- 
ing the long sections along the Delaware, Lackawanna and Western 
Eailroad and Pocono Creek, the Devonian rocks were followed north- 
easterly through Monroe and Pike counties, Pa., and across the Dela- 
ware River into New York. Numerous shorter sections were made 
along the gorges of the various creeks, across rocks of Middle and 
Upper Devonian age. The first of these local sections is along Marshall 
Greek, the nearest creek of any size to the east of Brodhead Creek. 
MARSHALLS CREEK SECTION. 
No. 1476 Al. — An exposure of blue, moderately arenaceous shale by 
roadside about one-half mile north of Marshalls Falls post-office, and 
only a few rods south of the entrance to Marshalls Falls. The fossils 
are common, mainly Hamilton, with a few Marcellus species, while the 
most common form is Leiorhynchus multicosta, Hall ( ?). A little farther 
up the road, about opposite the house, the shales are coarser, with a 
larger number of species, and these-are all Hamilton fossils. 
Fauna of No. 1476 Al. 
Leiorhynchus nmlticosta Hall (?) (aa) 
Tho specimens are all rather small and must be compared with fig. 26, PL 
56 (Geol. Surv, N. Y., Palaeontology, Vol, iv, Pt. I) of the above species, 
which is stated to be a young shell. There does not seem to be a specific 
difference between these and the specimens from the Marcellus shale of 
No. 1475 Bl, which are L, limitaris (Van.) Hall. 
Amboccelia umbonata (Con. ) Hall (a) 
Modiella pygimea (Con.) Hall (r) 
Nuculites oblongatus Con (rr) 
Nucula corbuliformis Hall (a) 
Nuculites triqueteT Con (r) 
Paheoneilo constricta (Con. ) Hall (?) (rr) 
Specimen badly crushed and distorted. 
Grammysia constricta Hall (r) 
Chonetes scitula Hall(?) _. (c) 
Chonetes lepida Hall (r) 
Chonetes mucronata Hall (rr) 
Lingula sp., a broken specimen with a strong median impression, cf. L. 
alveata Hall, but in proportions it is nearer L. delia Hall (rr) 
Orthoceras subulatum Hall (?) (rr) 
Leiopteria Levis Hall (rr) 
