JRE 
Clay pole.]} 232 [Sept. 21, 
Feet. 
POUCHES PhMCs hp toy merunin ene eiaa sume hus usnnie ere eUU 
PICMG RLG COLA a. ca orc aaare eal Wilu's Eels 4's Wabiviheis Gwe iN IIe 15 
Tropidoleptus shale.......... VERE NeW sigan bth: Bieldl 9h Sulina): SLO 
Hamilton Upper (Ochrey) shale... ccsecee ees vecescenre 100 
Hamilton Fossil ore and Paracyclas shale.............+.. 5 
PEM TOR CHI OEEOMO) Cle ia's'c veo Vk pace uw sthie Rute ci eee 
Tae CarpioLa SHALE AND Portraan Beps or Parry County. 
List of Fossils. 
1. Cardiola speciosa, Hall. 
2. Styliola fissurella, Hall 
3. Lunulicardium fragile, Hall. 
4. Amboceelia fimbriata, n. s. 
5. Strophodonta perplana, v. parva, n. v. 
6. Goniatites complanatus ?, Hall. 
7. Coleolus acicula, Hall. 
8. Poteriocrinus, sp. ? 
9. Aulopora tubiformis, Hall, 
10, Streptelasma, sp. ? 
11. Pleurotomaria ? 
Details on the paleontology and descriptions of the new species are de- 
ferred for want of time. 
The new species Ambocelia fimbriata named in the preceding list very 
much reserables the kindred species from the Hamilton, Ambdocalia umbo- 
nata Hall, but differs from it chiefly in being set with small, fine spines in 
regular concentric rows, a feature of which I have seen no trace in the 
fossils of this genus from other horizons in the county. The presence of 
these spines gives the casts of A. fimbriata an appearance much like those 
of Spirifera fimbriata, Hall. 
Wherever the two beds can be examined in position I have found that 
those containing Ambocelia lie above those containing Oardiola. In most 
sections only one of these fossils can be obtained, the exposures being 
usually small. Both are, however, so far as I have observed, strictly 
limited to this horizon, and consequently either is available for determin- 
ing it. 
The best exposure of the Cardiola shale in Centre township is about two 
miles 8. W. of New Bloomfield opposite the house of Mr. Samuel Brown, 
and for some distance thence toward the hill (Iron ridge) where a small cut 
shows the shales containing Oardiola speciosa and Ambocalia Jimbriata in 
abundance. Measurement of their thickness is difficult on account of the 
concealment of their base and the uncertainty of dip which is not uniform 
in either degree or direction. Considerably more than 100 feet ig exposed, 
and towards the upper part of the section the typical Chemung sandstones 
begin to appear among the shales. The Genesee slate is entirely con- 
