Art. II. Bownocker, Covjiifcroiis Rocks of Ohio 25 
Larnellibranchiata. Conocardium cuneus. Con., Modio- 
morpha concentrica (?) Con., Pterinea pinguis. H. 
Gastropoda. Callonema lichas. H., Euomphalus decewi. 
Bill., Platyeras dumosum. Con., Trochus kearneyi. H., Turbo 
shutnardi. Vern. 
Crustacea. Dalmanites aspectan.s. Con., Dalmanites ca- 
lypso. H., Proetus crassimarginatus. H. 
This fauna closely resembles that found below the bone- 
bed at other points in central Ohio. The rock is highly fossil- 
iferous, but the small scale on which it is worked does not af- 
ford good collecting ground. The species Zapkrentis gigantea, 
Stropheodonta ainpla, and Spirifera divaricata are more common 
here and in a better state of preservation than elswhere in Ohio. 
The fauna includes species from both horizons below the 
bone-bed. Further, specimens found at Marble Cliff at the ex- 
tremes of the section are present here, though the section is 
only 12 feet thick. This may be due to a shortening of the 
faunal section at this point, or, to a greater vertical range of the 
species whereby the extremes approach each other. 
MARION. 
The quarries adjacent to this city are the only ones visited 
by the writer where good sections comprising both divisions of 
Corniferous are found. The area which is small and is limited 
to a narrow ridge about one-half mile in length is situated a 
short distance northwest of the city limit. The southern cor- 
ner of this ridge is crossed by the C. H. V. & T. railroad. 
In the Morris and Christian quarry the strata below the 
bone-bed are exposed to a depth of 40 feet or more. The rock 
resembles that found elsewhere at corre$ponding horizons, but 
near the base is less compact, and perhaps more arenaceous. In 
the N. E. corner of this quarry the bone-bed is found. It is 
there covered by about 10 feet of strata, but to the west it soon 
reaches the surface. 
In the Evans quarry, just across the railroad from the pre- 
ceding quarry, the strata above the bone-bed are well shown. 
The bone-bed itself there lies about four feet above the railroad 
