Physo. 



642 



111., Vol. 6, 1875, p. 454, pi. 19, fi^s. 1 a, J, <?, etc., large fish 

 spine, side and hind views, and cross sections ; 2 (^, S, etc.,* 

 smaller one, side view and sections; 3 a^ b, c, etc., very small 

 one, side and front views, and cross sections. Two localities in 

 Iowa and Illinois. St. Louis limestone (next to top division 

 of sub conglomerate limestones). XI. 



Physonemus carinatus, St. John & Worthen, Geo. Sur 



^^ ^c ; Vi. Creol,3l{,VQL6,Fl.lg, s: 



/^ i; 



.->^ /':■ 



111., vol. 6, 1875, page 452, plate 18, figs. 4a, side view of frag- 

 ment of fish spine, restored ; J, front view ; (?, (^, cross sections ; 

 ha side of a more compressed specimen ; 5, c, cross sections. 

 Burlington, Iowa; Upper fish bed in the Einderhook limestone. 

 XL 



Physonemus chesterensis, St. John & Worthen, Geo. 



Sur. 111., vol. 6, 1875, page 455, plate 

 1 9, figs. 4^, enlarged X ^, side view of 

 fish spine, with cross section natural 

 size; h, X^, front view; c?, d^ e. X^, 

 cross sections. Chester 111. Chester 

 limestone (upper division of the sub- 

 conglomerate limestones.) XL 



Physonemus depressus, St. John & Worthen, Geo. Sur. 



4C 



S5s 



SVtrW 



C^eol. ///. 



J«7S, 

 VolC. 



