VERTEBRATES. 235 



Poecilodus sancti-ludovici ST. JOHN & WORTHBN. 



Poecilodus sancti-ludovici St. John & Wor then, 1883 : Geol. Sur. Illinois, 

 vol. VII, p. 132, pi. viii, tig. 8a. 



Horizon and localities Lower Carboniferous, Saint Louis 

 limestone: Saint. Louis. 



Deltodus littoni NEWBKRRY & WORTHEN. 



Deltodus littoni dewberry & Worthen, 1870 : Geol. Sur. Illinois, vol. IV , 

 p. 367, pi. iv, tigs. S-8a. 



Horizon and localities Lower Carboniferous, Keokuk 

 limestone: Boone county. 



Deltodus cinctulus ST. JOHN & WORTHEN. 



Deltodus cinctulus St. John & Woftben, 1883: Geol. Sur. Illinois, vol. 

 VII, p. 146, pi. ix,tigs. 6a-c. 



Horizon and localities. Lower Carboniferous, Saint Louis 

 limestone : Barrett (St. Louis county). 



Deltodus parvus ST. JOHN & WORTHEN. 



Deltodus parvus St. John & Worthen, 1883: Geol. Sur. Illinois, vol. VII, 

 p. 150, pi. ix, figs. la-c. 



Horizon and localities. Lower Carboniferous, Saint Louis 

 limestone, Saint Louis. 



Deltodopsis sancti-ludovici ST. JOHN & WORTHEN. 



Deltodopsis sancti-ludovici St. John & Worthen, 1883: Geol. Sur. Illinois, 

 vol. Vil,p. 161, pi. xi, figs. 2a-e. 



Horizon and localities . Lower Carboniferous, Saint Louis 

 limestone : Saint Louis. 



Psammodus plenus ST. JOHN & WORTHEN. 



Psammodus plenus St. John & Worthen, 1883: Geol. Sur. Illinois, vol. VII, 

 p. 213, pi. xvii, figs. la-f. 



Horizon and localities Lower Carboniferous, Saint Louis 

 limestone : Saint Louis. 



Copodus vanhornii ST. JOHN & WORTHEX. 



Copodus vanhornii St. John & Worthen, 1883: Geol. Sur. Illinois, vol. 

 VII, p. 229, pi. xx, figs. 2a-d. 



Horizon and localities. Lower Carboniferous, Saint Louis 

 limestone : Saint Louis. 



