Permo-Carboniferous Ammonoids of the Glass Mountains 219 



Plate IV. 



Fig. 1-36. .Schistoceras diversecostatum nov. sp. — Zone of Uddenites (Wolf- 

 camp formation). — Wolf Camp, Glass Mountains. 



Fig. 1, side view ; fig. 2, front ; fig. 3, venter ; natural size. 



Fig. 4, side view ; fig. 5, venter ; fig. 6, front ; natural size. 



Fig. 7, venter ; fig. 8, side view ; natural size. 



Fig. 9, venter; fig. 10, front; fig. 11, side view; natural size. 



Fig. 12, side view ; fig. 13, front ; fig. 14, venter, of the same speci- 

 men"; twice natural size. Showing ornamentation. 



Fig. 15, venter ; fig. 16, front ; fig. 17, side view ; natural size. 



Fig. 18, venter ; fig. 19, front, of the same specimen ; twice natural 

 size . 



Fig. 20, side view ; fig. 21, front ; fig. 22, venter ; natural size. 



Fig. 23, venter ; fig. 24, front ; fig. 25, side view, of the same speci- 

 men; twice natural size. Showing gastrioceran ornamentation. 



Fig. 26, external suture of the specimen figured in fig. 7, 8 ; natural 

 size. 



Fig. 27, side view; fig. 28, front; fig. 29, venter; twice natural 

 size of the specimen figured in fig. 30-32. Showing the ornamenta- 

 tion. 



Fig. 30, front; fig. 31, side view; fig. 32, venter; natural size. 



Fig. 33, side view; natural size. 



Fig. .34, side view of the same specimen; twice natural size. 



Fig. 35, internal suture of specimen illustrated in fig. 27-32. The 

 suture belongs to the next larger whorl. Natural size. 



Fig. 36, external suture of the specimen illustrated in fig. 1-3. 



