CLINTON CONGLOMERATES AND WAVE MARKS. 187 
of the last kind is seen a short distance east of the farm line 
mentioned (locality 29), and is very rich in fossils. Down the 
stream, across the line, behind the house (locality 30), the Clin- 
ton bowlders show the nearest approach to pebbles seen in this 
section. Strongly rounded specimens of Favosites, Heliolites, 
and Cyathophyllum are quite common here and are also found 
farther up stream. Behind the house some specimens do not 
show structure but may possibly have been strongly rounded 
stromatoporoid sponges. It would require microscopic sections 
to determine the matter. Farther down stream the reddish color 
disappears, and where the creek passes under a bridge to the 
north side of the railroad the west embankment of the bridge 
(locality 32) exposes 8 feet of the basal part of the Clinton. 
It has a very irregular structure, similar to that called shelly 
above, is very siliceous, and contains nodules of chert. The 
piers of the bridge on this side were constructed by going down 
into the bottom of the creek bed, and there Cincinnati rock was: 
struck, showing well-known Cincinnati fossils in abundance. At 
the top, the thin Cincinnati limestone fragments show a thin 
coating of a shaly material, in which annelid teeth are found. The 
total section of the Clinton is therefore shown along this stream. 
It hardly exceeds 30 feet, as determined by estimates made 
without the assistance of instruments. The top layer of the 
Cincinnati group shows abundant encrinital remains, and numer- 
ous specimens of a small Tentaculites. Leptaena sericea is com- 
mon. The following species were observed in the Clinton, 
chiefly in its upper courses, though the middle courses are in 
places rich in fossils; but the latter were not examined: Illenus. 
ambiguus, pygidium in the Lower Clinton; Calymene vogdesi, 
both of large and medium size ; Cyclonema bilix, Leptena rhom- 
boidalis, Strophomena patenta, Orthis calligramma var. eu-orthis, 
Orthis biforata var. reversata and var. daytonensis, the latter 
with only three plications on the median fold; Orthis elegantula, 
Rhynchonella scobina, Clathropora frondosa, Phenopora, a long 
simple frond 10 mm. broad at the top, species unknown, Aspi- 
dopora parmula, very common in the richly fossiliferous layer 
