160 PSEUDOCERATITES OF THE CRETACEOUS. 
-The ventral and also the first lateral saddle are asymmetrical. These 
have the usual form but are rather narrow. The internal parts of the 
sutures are deflected orad toward the umbilical shoulders so that they rise 
materially, giving them a pecular aspect in this specimen. The lobes are 
similar to those of emarginatum, but are narrower and shorter and the saddles 
broader and shorter in proportion. The second to the sixth saddles are 
entire, the seventh to the ninth bifid, and the tenth saddle is on the line of 
involution. The sutures are the same on both sides of this specimen. The 
lobes are irregularly bifid. 
There is a fragment of a larger size consisting of one-fourth of a 
volution with stouter proportions, labeled ‘‘ Locality 1490 U. S. Geological 
Survey, north of Pottsboro, Tex., Upper Comanche (Grayson),” that may 
belong to the same species, but the sutures and aspect are distinct enough 
to belong to a different species.“ 
The inner line of large nodes and the median lateral are present, but 
no outer line, and there are similar distinct costations. 
The venter has a similar outline also, but the specimen being larger 
and older, the venter is more rounded. 
The sutures are similar, except that the inner arm of the first lateral 
saddle is much narrower and entire, the outer arm is distinctly bifid, making 
the whole outline approximately. trifid, the remaining saddles are longer and 
distinctly phylliform as in Sphenodiscus, and the lobes are correspondingly 
broader apically as in that genus. These effects may perhaps be due to 
the greater age of the specimen. There is apparently the same number of 
lobes and saddles. There are nine saddles visible on the broken end, right 
side, and there may be one more, making ten saddles and nine lobes. 
A fragment obtained from Dr. F. A. Udden, locality northeast of Little 
River station, Rice County, Kans., is the original specimen used by Cragin 
and is figured below on Pl. XIX. It is in fine state of preservation, being 
fossilized with iron pyrite. The breadth of the side is 53 mm., the greatest 
transverse diameter is at about one-third of the breadth from the line of 
involution and is 20.5 mm. Theventer is very narrow, about 3 mm. in breadth; 
it has no obvious nodes, but, as in the type, faint undulations may be felt with 
the finger on the ventro-lateral angles. The sutures are quite different, but 
have the same general character. The first lateral saddles are quite 
distinct on the two sides, owing to the asymmetry of the ventral lobe. 
4 Figured as Engonoceras retardum n. sp. Hyatt, Pl. XV, figs. 15-17. 
