88 
BULLETIN OF THE LABORATORIES 
volutions is concave, the outer margin is distinctly angled, and there 
is apparently an inner carina at the suture line. The under surface is 
evenly convex, widely umbilicate. The spire is slightly elevated, but 
is poorly preserved. The lines of growth are irregular. -Our own 
opinion is that the present form is intermediate between E. obtusus 
and E. latus. The figure has been partly restored and must not be 
too implicitly trusted except for size and general configuration. 
Eree-stone layers of middle VVaverly, 6 miles northwest of Gran- 
ville. Collected by W. F. Cooper. 
Eiwmphalits [spirorhis , ?) 
(Plate II, Fig. 33. ) 
(Fig 33b is quite incorrect, the appearance of a lip is misleading 
and the spire is rather higher. 'The specimen having been since re- 
moved from the matrix these errors have been detected. ) 
No opportunity has been afforded to compare with Hall’s E. spir- 
orbis hence our reference is based solely on memory. Shell small, el- 
evated, closely coiled, umbilicate, having from four to five volutions. 
Volutions rather evenly convex, deeply excavated above for the supe- 
rior volution, otherwise nearly circular in section Height nearly equal 
to the diameter of the largest volution. 
Height of four volutions 7 mm; diameter of lower volution near- 
ly 9 mm. Free-stone middle Waverly. This species reminds one of 
E. spergensis, var. planorbiformis, but the sjiire is higher. 
Bellerophon cyiHolites, Hall. 
(Plate VHI, Fig. 20; Plate IX, Fig. 29.) 
Shell of medium size, laterally somewhat compressed, obtusely 
carinate ; whorls very rapidly enlarging, slightly embracing, transverse 
section rhombic, sub-cordate, broadest near the umbilicus; dorso-lat- 
eral slope flat or somewhat concave peripherally, strongly curved near 
umbilicus; umbilicus rather small. Aperture sub-cordate with a deep 
but not abrupt, acute notch. 
Surface marked by numerous sharp geniculate or strongly curved 
transverse strite meeting on the dorsum with an acute angle. Besides 
