prosser.] MARSH ALLS CREEK SECTION. 21 
Actinopteria muricata Hall ( ?) (it) 
This maybe a small specimen of A. boydi (Con.) Hall, for it is broken, and 
according to the descriptions these species have similar markings, but 
A. boydi is a large species and this specimen is small. 
( ?) Leiopteria cf. gabbi Hall (rr) 
Loxonema sp " (rr) 
No. 1476 A2.— Marshalls Falls, on Marsh alls Creek, one-half mile 
north of Marshalls Falls post-office. The entire exposure is apparently- 
Lower Hamilton. Prof. White says, "The stream has cut a narrow 
gorge at the base of the Hamilton only 5 to 8 feet wide, through which 
it falls into a large amphitheater hollowed out of the soft Marcellus 
beds below." 1 It is true that in the blue shales below the falls fossils 
are not nearly so abundant as they are farther up the bluff, but those 
that do occur are Hamilton species. In the amphitheater below the 
falls Vitulina pustulosa Hall occurs in the shales just at the water's 
edge, and this is a well-known Hamilton species. In the fine shales of 
the bluff forming the lower portion of the falls the smaller forms of 
characteristic Hamilton fossils are quite abundant. Above the brink 
of the falls the rock is more coarsely arenaceous, and in this Spirifera 
granulifera Hall (?) and similar species occur. Prof. White says, "At 
the head of the falls numerous fossils were observed, among which were 
Spirifer granuliferus, Grammy sia bisulcata, Athyris spiriferoides, besides 
numerous crinoidal steins." l 
Fauna of No. 1476 A2— (from the edge of water below Marshalls Falls). 
Vitulina pustulosa Hall (rr) 
Cbonetes mucronata flail (?) (rr) 
Rather poorly preserved specimens and not safe to identify tbem posi- 
tively. 
One specimen of a smooth impression which looks as though it might he 
a fragment of an algoid frond. Similar impressions wire seen at several 
localities in the Hamilton shales of northeastern Pennsylvania. 
Fauna of No. 1476 A2. 
Vitulina pustulosa Hall (aa) 
Amhoccelia umbonata (Con.) Hall (rr) 
Spirifera mucronata (Con.) Bill (a) 
Spirifera granulifera Hall ( ?) (rr) 
Possihly S. medialis Hall, hut there is a strong furrow in the mesial fold. 
Tellinopsis suhemarginata (Con.) Hall (rr) 
Phacops rana (Green) Hall (c) 
Dalmanites hoothi (Green) Hall (?) (r) 
Chonetes lepida Hall • (rr) 
Chonetes deflecta Hall (?) (c) 
Chonetes mucronata Hall (?) j (a) 
Part of the ahove specimens are undoubtedly C. mucronata and thence 
they grade up to typical C. deflecta. These and specimens from other 
localities seem to prove Prof. HalFs suspicion that 0. deflecta is only a 
larger form of C. mucronata (Geol. Surv. N. Y. Pake ontology, Vol. iv. 
Pt. i, p. 126). 
* l G 6 , p. 255. 
