174 PSEUDOCERATITES OF THE CRETACEOUS. 
entire. The lobes are all shorter, with broader ends apically and with less 
complex digitations than on the right side. 
One small specimen, a cast from locality 1492, 15 miles west of 
Denison, Tex., has a diameter of 46 mm., outer part of volution, 23 mm.; 
ry 
transverse diameter, 11 mm.; umbilicus, 7 mm.; and opposite diameter from 
line.of involution to venter, 16 mm.; transverse diameter, 7.5 mm. This 
has the same shape of venter and general aspect. The nodes of the inner 
line are present as elongated costz, which are most prominent at the 
umbilical shoulders and much inclined orad. Very obscure nodes could 
be felt over the more perfect surface of the cast along the centran lateral 
area. The cast was too imperfect along the venter to observe nodes, but 
at the beginning of this volution on a small bit of the shell of the venter 
exposed by excavation there were smooth ridges at the ventro-lateral 
angles, and the venter was concave. 
The sutures in this are crowded together unusually close for shells of 
this genus, the inner lobes and saddles overlapping slightly, beginning with 
the third lobes and fourth saddles. It is probably a dwarfed form of this 
species, since in the earlier part of same volution the sutures are well sepa- 
rated, as in other forms. 
The ventral lobes are obliterated, but sufficient of the first lateral 
saddles remain to show that they were unequally bifid and that the outer 
arm was also bifid, the inner arm entire and quite large. The second to 
fourth saddles on the left side were broad and entire, the fifth to seventh 
symmetrically and deeply bifid, the eighth very broad and unequally bifid, 
the outer arm faintly bifid, the ninth alone entire. There is considerable 
variation on the right side, the sixth saddle is not deeply bifid, the seventh 
is unequally bifid, the eighth is like that of the left side, but the bifidity of 
the margin of the outer arm is more pronounced. ‘The ventral lobe is 
symmetrical, but so much worn down that no observations were practicable 
except at two of the sutures, when it seemed to have the usual generic 
form. The living chamber was not present in either of the above-described 
specimens. 
A small cast from Bell County, Tex., No. 8301a, about a fourth of a 
volution, is 23 mm. in diameter from line of involution to venter, transverse 
diameter 14 mm., two lines of tubercles and median line of elevations well 
defined, venter distinctly concave. The sutures appear to have more 
