ENGONOCERATID®. 159 
the usual gerontic characters—that is, before the venter becomes convex 
and more or less zigzag in outline.. The type of Cragin’s species is the 
small specimen referred to above. This has sutures with numerous small 
saddles closely set on the suture line, and, so far as could be seen, one of 
Cragin’s fossils of the same lot with that figured had similar sutures. 
Cragin describes this species as having a row of tubercles that may be 
developed on the inner ends of the low folds or costee occupying the outer 
half of the sides. There are some very obscure signs of the existence of 
such markings in these fossils also. These are doubtful even to the touch 
and are not visible to the eye. This may be owing to the condition of the 
fossils. 
Locality: Belvidere, Kans. 
Age: Champion bed and Kiowa shales, probably near base of 
Washita Comanche series, Lower Cretaceous. 
ENGONOCERAS UDDENI (Cragin). 
Pl. XIX, figs. 1-6. 
Sphenodiscus belviderensis var. uddeni Cragin, 1900, Colorado Coll. Studies, Vol. 
VIII, p. 30, pl. 1, figs. 3, 4. 
A fragmentary cast in iron pyrite, No. 23147 U.S. National Museum, 
Pl. XIX, fig. 4,5, shows a few of the last sutures and a portion of the 
living chamber. The diameter, partly estimated, is about 82 mm., the 
outer volution is 44 mm., the umbilicus 8 mm., the same volution opposite 
from line of involution to venter 30 mm., no shell being present. The 
form is compressed and highly involute, but slightly stouter than in the 
more compressed emarginatum. There is only one line of nodes, those on 
the umbilical shoulders. The costz are fine, and like elevated bands of 
growth gathered to a focus at these nodes. They are sigmoidal with single 
fine lines between the nodes, externally more pronounced folds appearing 
in the later gerontic substage, but no nodes are present on this part in this 
specimen. The venter is flattened until near the last part of the living 
chamber, which is distorted through compression. 
The part of the living chamber preserved indicates that it was not less 
than half a volution on the umbilical side. The ten lobes and eleven 
saddles on both sides are very similar in outline to those of emarginatum. 
The seventh and eighth lobes on both sides are bifid. 
