222 University of Texas Bulletin 



Fig. 36, cross-section ; fig. 37, side view ; fig. 38, venter, of the same 

 specimen; twice natural size, 

 fig. 39-54. .Agathiceras Frechi nov. sp. — Zone of Uddenites (Wolf camp forma- 

 tion)— Wolf Camp, Glass Mountains. 



Fig. 39, venter; fig. 40, front; fig. 41, side view; fig. 42, external 

 suture; natural size. 



Fig. 43, front; fig. 45, side view; fig. 46, venter; fig. 47, external 

 suture; natural size. 



Fig. 44, side view; natural size. 



Fig. 48, side view; natural size. 



Fig. 49, venter; fig. 50, side view; fig. 51, front; natural size. 



Fig. 52, front; fig. 53, side view; fig. 54, venter of the same speci- 

 men, showing the ornamentation ; twice natural size. 



