pRossEfc.J DELAWARE RIVER SECTION. 41 
to the north. Possibly the covered slope to the south is his Genesee, 
in which case this exposure would be the base of the Chemung accord- 
ing to his correlation. 
Prof. White states : " It [the Genesee] is well exposed along the Dela- 
ware river on the New York shore, 2 miles above Port Jervis, where it 
is seen dipping north 25°, west 10° to 11°, and exhibiting clearage 
planes at a high angle to the southeast. It is also quite fossiliferous, 
containing ISpirifer mucronatus, Athyris spiriferoides, Microdon bellis- 
trtata, Tropidoleptus carinatus, and many other forms." 1 Prof. Lesley 
says the Genesee makes its appearance " at the ninetieth milepost of the 
Erie Railroad" and describes it as composed of " dark sandy slates, 200 
feet thick, holding Spin/era mucronata, Athyris spiriferoides, Tropido- 
leptus carinatus. (*?)" 2 It seemed odd to the writer when he first 
saw the statement that these rocks were called Genesee, because the 
fossils enumerated have never been regarded as characteristic Genesee 
species in New York. This will be immediately appreciated on noting 
the range of the species mentioned: Spirifera mucronata (Con.) Bill, 
occurs in the Marcellus, Hamilton, and doubtfully in the Portage of 
eastern New York; Athyris spiriferoides (Eaton) Hall, in the Upper 
Helderberg and Hamilton; Microdon bellistriatus (Con.) Hall, in the 
Hamilton, Ithaca, Portage of eastern Pennsylvania, and Chemung; 
Tropidoleptus carinatus (Con.) Hall, in the Hamilton, Portage, Portage 
of eastern New York and Pennsylvania, Oneonta, and Chemung. 
Fauna of No. 1477 A8. 
Tropidoleptus carinatus (Con.) Hall (aa) 
.Spirifera mucronata (Con.) Bill (aa) 
Spirifera tullia Hall (?) (rr) 
Palaeoneilo constricta (Con.) Hall (r) 
Nuculites triqueter Con (rr) 
Palseoneilo emarginata (Con. ) Hall (rr) 
Nncula bellistriata (Con.) Hall (rr) 
Palaeoneilo muta Hall (rr) 
Palseoneilo maxima (Con.) Hall (rr) 
Nucula corbuliformis Hall (r) 
Nuculites oblongatus Con (c) 
Nuculites cuneiformis Con (rr) 
Goniopliora hamiltonensis (Hall) Mill (rr) 
Microdon (Cypricardella) tenuistriatus Hall ( ? ) (c) 
Tellinopsis subemarginata (Con.) Hall (rr) 
Pboladella radiata (Con.) Hall (rr) 
Leda diversa Hall (rr) 
Grammysia bisulcata (Cou.) Hall -.. (rr) 
Cimitaria corrugata (Con.) Hall (rr) 
Hyolitbes aclis Hall (rr) 
Tentacnlites bellulus Hall (c) 
Aetinopteria boydi (Con.) Hall (rr) 
Cyrtina bamiltoneusis Hall (rr) 
»G«, p, 108. 
2 Sum. Desc. Geol. Penn., Vol. IT, p. 1217, footnote ; sec, in addition p. 1325, 
