upper Ordovician at Vcvay, hid. — C innings. 
373 
310' 
25' 
20' 
5' 
80' 
..1 
60' 
40' 
20' 
lb' 
50' 
55' 
12' 
30' 
20' 
44' 
6' 
46' 
44' 
Strophomena planoconvexus. 
Fossils rare. Worn specimens of Orthis testudin- \ 
aria. I 
Homotrypa curvata,Dekayiaaspera, Heterotrypa 
frondosa. ^XII a. 
Callopora dalei, C. subplana, Peronopora vera. I 
Reappearance of Dekayella fauna. I 
) Callopora sigillaroidea (large {orm) , Constellaria 
j constellata var. prominens. 
Zone of Dekayella virichi, D. Obsciira, Batos- 
toma janiesi, B. implicatum, Callopora sigil- 
laroidea, Coeloclema alternatum, C. concentri- 
. cum, Dallmanella multisecta, etc. 
Triniicleiis concentricus and T. bellulus. 
Nearly barren. 
Zone of Leptohalus insignis, Triarthrus, becki, etc. 
(>XI b. 
Low water level of Ohio river at Cincinnati. 
Tabulation of Section at Yevay. 
Platystrophia lynx (aa) (zone A). 
\ P.laticosta, etc. 
(Zone a co h. Monticulipora wolesta, Hetero- 
trypa frondosa, H. prolifica (near top), H. 
inHecta, Callopora rugosa, C.ramosa, Nichol- 
sonella vaupeli, Rafinesquina fracta. R. nasuta, 
R. ponderosa. Hebertella sinuata. Plectorthis 
plicatella, Platystrophia laticosta, etc. 
Callopora snbplana, Homotrypa curvata, De- [ u 
kayia aspera (zone a). — 
XI a. 
B3 ^ 
-CJ o 
■2 "^ 
5- Z 
o X 
20' 
Platystrophia bi/orata, Constellaria constellata. 
Constellaria constellata, Escharopora pavonia, 
Platystrophia laticosta, (No. 73.) 
Platystrophia hiforta (small), Dekayella ulrichi 
(No. 63), lowest specimens of Platystrophia. 
\Rafincsquinn nlternata very abundant, Dalman-^ 
f ella multisecta abundant. 
Callopora onealli communis abundant. c . "S 
Zone (i^ Dekayella ulrichi. etc., Dalmanclla nnil !-;:: ^S 
tisecta, etc., (Nos. 3 to 49). fQ'.' 
Trinucleus concentricus (No. 23). 
Dekayella ulrichi, lialostoma implicatum. Callo- 
pora sigillaroides, Coeloclema alternatum, etc. 
(No. 11). 
o 
- 2-« 
E X 
