16 PENNSYLVANIA AND NEW YORK DEVONIAN. [bull. 120. 
No. 1475 D— 3. — Down the bank, just opposite the Tanite works, by 
Pocono Creek, the shales are blue and more arenaceous than those by 
the roadside. 1 
Fauna of No. 1475 D— 3. 
Amboccelia umbonata (Con. ) Hall (r) 
Chonetes rnucronata Hall (r) 
Dalnianites boothi (Green) Hall (?) (rr) 
The lithologic character of the shales and the fauna show that these 
exposures are typical Hamilton rocks. 
No. 1475 Dl. — Exposures along Pocono Creek, just north of the 
covered bridge at Bartonsville. The dip is about 12° and the direc- 
tion 25° west of north. The ledges consist of sandstones, frequently of 
irregular bedding with an approach to concretionary structure, similar 
to those along the highway below Spragueville, and a little above the 
railroad crossing, alternating with somewhat bluish shales, and vary- 
ing from 1 to 2 feet in thickness. The small concretions in the shales 
usually contain fossils. Nearly all the fossils are small forms which 
occur sparingly in the shales, more frequently on the surface of the 
sandstones, but are most common in the shaly arenaceous layers. 
Fauna of No. 1475 Dl. 
Tropicloleptus carinatus (Con. ) Hall (rr) 
Paracyclas lirata (Con. ) Hall (r) 
Spirifera mesacostalis Hall (a) 
Clionetes setigera Hall (?) (aa) 
Part of the specimens are very near to the form of this species found in 
the " Ithaca group " at Ithaca, N. Y. ; others are in some of the charac- 
ters suggestive of C. lepida Hall, there being two rather stronger ribs 
and in one specimen five intermediate ones; while a few specimens have 
the elongated form of C. scitula Hall, but they do not have the numer- 
ous plications of that species. 
Leda di versa Hall (rr) 
Khynchonella stephani Hall (c) 
Leiorhynchus mesacostalis Hall (rr) 
Nuculites oblongatus (Con.) Hall (?) (rr) 
Distorted, but pretty surely this species. 
Microdon (Cypricardella) bellistriatus (Con. ) Hall (rr) 
Modiomorpha subalata (Con.) Hall, var. chemungeusis Hall (?), broken and 
distorted specimens which closely resemble this variety (r) 
Actinopteria cf. boydi (Con.) Hall (rr) 
Pleurotomaria sp t (rr) 
Platyceras sp (rr) 
Spirifera sp., large impressions imperfectly preserved which may be compared 
with S. mesastrialis (rr) 
This fauna occurs in what was called " Chemung" by Prof. White, 
and corresponds to the exposures along the highway below Sprague- 
ville and to those above the railroad crossing. 
'This exposure is mentioned by Prof. White, who says; "Just opposite the Tanite Company's 
works, a bluff of Hamilton rocks, 65 feet high, rises almost vertically from tho bed of Pocono." G 6 > 
p. 271. 
