258 _R. P. Stevens on new Carboniferous Fossils. 
work demands, and which it has called forth. 
. The Coast Survey is a national work of which we may well 
It is esti- 
mated that if the annual appropriations are continued upon the 
.. scale, the survey can be completed in about twelve years. 
oe anna 
VI.—Description of New Carboniferous Fossils from the 
Art. XXVI. » 
Appalachian, IUinois and Michigan Coal-fields; by R. P. STEVEN 
BELLEROPHON.—B. globosa, n. s. Shell globose, Lei | 
um 
Ears extended and artially enrolled around a small th, 
Outer lip moderately inflated, Sinus wide. Pillar lip or 
scarcely projecting into the mouth of the shell. Surface, hil 
iting ndges, extending from one umbilicus to the other, ph 
curved backwards on the dorsum. No carina. Width 0 
an inch, height 0°6 of an inch. pen 
_ Geological position. In the upper shales of the coal meas rn 
Associated with B. urii, B. inatus, Myalina su 
Pleurotomaria virgillati, and other carboniferous fossils. 
Localit: < e, Til. 
