334 



GEOLOGICAL SURVEY OF TEXAS. 



Fie. 30. 



Fir. 31. 



Mm®' 



Fig. 32. 



Fig. 33. 



Metacoceras cavatiformis, n. s. 



Near Kansas City, Mo. 



Coll. A. Hyatt and Dr. J. S. Newberry. 



Figs. 30-33, natural size. 



The flat sides in M. cavatiformis incline outwards very slightly, the umbil- 

 ical shoulders are rounded, and the abdomen narrower than the dorsum. 

 There is a row of elongated nodes along either edge of the abdomen and the 

 central zone of the abdomen is depressed. There, are slight swellings or 

 crests on either side of the central depressed zone along the abdomen of the 

 casts examined, but these did not have tubercles. 



The whorls differ markedly from other species of this genus, and in fact 



