PLATE 38 



Gomphoceras hyatti Whitfield 

 Page 158. 



Fig. 1. Side view of a large specimen. (XJ^). 



(Grand Tower limestone.) (W. M. 23896.) 



Gomphoceras missouriensis Branson and Williams 

 Page 160. 



Fig. 2. Side view of the largest specimen collected. 



(Grand Tower limestone.) (W. M. 23900.) 



Gomphoceras plenum Hall? 

 Page 160. 



Fig. 3. Side view of the living chamber of the only specimen collected. (XJ^). 

 (Grand Tower limestone.) (W. M. 23984.) 



Nephriticeras n. sp. 

 Page 158. 



Fig. 4. The only specimen in the collections. (X^). 

 (Grand Tower limestone.) (W. M. 1878.) 



