SulnarhDuifcroifi and Carlnniifi'rous Cephalopoda. 165 



Found on Brusli Creek, in the Upper Coal Measures, near 

 Kansas City, Missouri, and now in the collection of Charles 

 Faber. 



GoNIATITl-:s SCIOTOKNSIS, n. sp. 



Plate 6, J'ig. 2, side vie-w, )iatural size ; Fi^. ?, dorsal vieic 2vitli 

 anterior end turned downward, and, shozvini^' radiatii/o fur- 

 roivs curving backward over the dorsum. 



Shell medium, or rather above medium size; somewhat 

 lenticular in form, obtusely rounded on the dorsum. Umbili- 

 cus consisting of a shallow, funnel-shaped fossette, without 

 exposing any of the volutions. Volutions few, rapidly en- 

 larging the outer ones profoundly grooved for the reception 

 of the inner ones, and depressed convex on the sides. The 

 greatest transverse diameter is at the margin of the umbilical 

 fossette, and it is about two-thirds the dorso-ventral diameter. 

 Seven furrows radiate from the margin of the umbilicus on 

 each side, curve gently forward at the superior lateral sides 

 and then curve more abruptly backward across the dorsum, 

 as shown in our specimen. Probably, if the specimen was 

 perfectly preserved, it would show eight of these radiating 

 furrows. Surface between the furrows showing traces of finer 

 similarly sinuous lines. Body chamber and aperture unknown. 



The sinuosities of the septa, as near as they can be deter- 

 mined from our specimen, may be described as follows: 

 Dorsal lobe lanceolate and pointed, superior lateral lobes 

 longer than the dorsal, and pointed at the extremities; dorsal 

 saddle sublinguiform, gradually narrowing and rounded at 

 the extremity, lateral saddles similar in outline, the three in- 

 ferior lobes short with corresponding saddles. 



The lenticular form, funnel-shaped umbilical fossette, and 

 the surface markings, including the radiating furrows, will 

 distinguish this from all other species. 



Found above Sciotoville, on the Ohio River, in rocks 

 usually classed with the Waverly Group, but they are above 

 the Waverly sandstone proper, and probably belong to the 

 upper part of the Subcarboniferous system. The specimen 

 described belongs to the collection of Charles Faber. 



