90 
BULLETIN OF THE LABORATORIES 
ilar striae diverge spirally and irregular[ly] until intercepted by the 
former set or by each other. Cast smooth, perforately umbilicate. 
Average diameter of adult .47 (100); height of last whorl at the aper- 
ture .26 (55): height of aperture .18 (38); showing the inner whorl 
impressed into outer .08 (17); width of aperture .35 (74); depth of 
notch .22 (47); width of peripheral belt at notch .06 (13); separating 
distance between tip of auriculations and inner whorl .10 (21); num- 
ber of striae in i-io in. .10 (in young and old) largest seen diameter 
of -53.’’ Bellerophon galericulatus is quite common in the shales four 
feet below congl. I. 
Bellerophon, sp ? 
(Plate XII, Fig. 36. ) 
A species with decided Devonian affinities is illustrated from the 
nodules at Mooi’s run. It is sufficiently distinct from any of the above 
species, but we have no time to study its relations with Devonian 
species. 
Bellerophon perelegans , M. and w. ? 
(Plate IX, Fig. 30. ) 
“Shell small, subglobose ; umbilicus small, aperture transverse, 
reniform. Back and sides marked by fine, sharply elevated revolving 
lines, which are about equal to the spaces between them, finer and 
more closely arranged in the middle than on the sides of the shell. 
Dorsum marked by a narrow, elevated, revolving band, bounded on 
either side by a shallow depression. The revolving lines on the band 
are much finer than those on the body of the shell. Very fine strise 
of growth cross the revolving striae, giving a finely cancellated appear- 
ance to the surface. Margin of the peristome nearly straight or with 
a gentle backward curvature to the shallow central notch.” 
Our knowledge of this species is confined to fragments of several 
individuals with tolerably constant characters. 'I'heband, except near 
