EXPLANATION OF PLATE LVI. 



Page 



FIG. 1. Goniaiites sp . 1 



Lateral view . (Hare collection . ) 

 Carboniferous, Upper Coal Measures. 



FIG. ?-. Nautilus winslowi 228 



D >rsal aspect. 

 Carboniferous, Coal Measures. 



FIG . 3 . Nautilus missouriensis 224 



Dorsal aspect. 

 Carboniferous, Coal Measures. 



FIG . 4 Nautilus forbesianus 22$ 



4a. Side view. 



4b. Lateral aspect. 



Carboniferous, Coal Measures. 



FIG 5. Nautilus ferratus . 



5a. D >rsal aspect . (Hare collection . ) 

 5b. Side of same. 



Carboniferous, Upper Coal Measures. 



FIG . 6 . Orthoceras rushensis 226 



6a. Small and somewhat imperfect specimen. 

 Carboniferous, Upper Coal Measures. 



