Art. II.] Bownocker, Corniferoiis Rocks of Ohio 3 5 
6 , Absence or rarity of Leptaena rhomboidalis. 
7. Presence in considerable numbers of Siropheodonta de- 
missa, and the unusual size of these. This species, elsewhere 
in this state, has a width of i inch or more, but here it has a 
width of little more than inch. 
The formation and fauna at this place differ conspicuously 
from those of central Ohio. The rock resembles fairly well 
that found elsewhere below the bone-bed, but the blue-black 
stone so well shown at Delaware, Marion and Sandusky is not 
present here. 
However, some of the most common White House spe- 
cies are found elsewhere above the bone-bed. These are T. 
scalariformis and S. ziczac. On the other hand, many forms 
common in the Columbus horizon are abundant here also. 
These include especially the genera Siropheodonta^ FavositeSy 
Conocardmm, ParacyclaSy AtrypUy Isonemay and Platyceras. 
In other words, the two faunas of central Ohio appear to 
mingle in the upper part of the White House section, and hence 
the two fold division of strata and faunas made in central Ohio 
cannot be made at this point. However, the summit of this 
section must be placed at the top of the Ohio Corniferous — 
above the Delaware or Sandusky beds. It resembles the 
latter in such species as T. scalariformis and 5 . ziczac y both of 
which are abundant That it is higher than those beds is shown 
by Pholidostrophia nacrea and Produciella spinidicostay both of 
which are here common, though in New York they are well 
known Hamilton species. 
BELLEFONTAINE. 
Several quarries are worked in or near this city, but what 
is said below refers to the two quarries situated about one-half 
mile northwest of the “ Big 4 ” station. The rock is here quar- 
ried to a depth of about 25 feet. It resembles the light col- 
ored stone of this age found elsewhere in the State, but is less 
compact and has a more arenaceous appearance than any other, 
White House excepted. The stone is not worked extensively 
