VERTEBRATES. 233 



Vaticinodus? simplex ST. JOHN & WORTHEN. 



Vaticinodus ? simplex St. John & Worthen, 1883 : Geol. Sur. Illinois, vol. 

 VII, p. 84, pi. iv, figs. 22a-b. 



Horizon and localities. Lower Carboniferous, Saint Louis 

 limestone : Saint Louis. 



Deltoptychius wachsmuthi ST. JOHN & WORTHEN. 



DeUoptychius wachsmuthi St. John & Worthen, 1883: Geol. Sur. Illinois, 

 vol. VII, p. 93, pi. v, figs. la-c. 



Horizon and localities. Lower Carboniferous, Keokuk 

 limestone : Boonville (Cooper county). 



Deltoptychius expansus ST. JOHN & WORTHEN. 



Deltoptychius expansus St. John & Worthen, 1883 : Geol. Sur. Illinois, vol. 

 VII, p. 98, pi. v, fig. 9a. 



Horizon and localities. Lower Carboniferous, Saint Louis 

 limestone : Saint Louis. 



Stenopterodus parvulus ST. JOHN & WORTHEN. 



Stenopterodus parvulus St. John & Worthen, 1883 : Geol. Sur. Illinois, vol. 

 VII, p. 107, pi. iv, fig. 4a. 



Horizon and localities. Lower Carboniferous, Saint Louis 

 limestone : Saint Louis. 



Cochliodus obliquus ST. JOHN & WORTHEN. 



Cochliodus obliquus St. John & Worthen, 1883: Geol. Sur. Illinois, vol. 

 VII, p. 126, pi. vii, figs. 17a-c. 



Horizon and localities- Lower Carboniferous, Saint Louis 

 limestone : Saint Louis. 



Cochliodus vanhornii ST. JOHN & WORTHEN. 



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

 VII, p. 120, pi. vii, figs. la-e. 



Horizon and localities. Lower Carboniferous, Saint Louis 

 limestone : Saint Louis. 



Xystrodus imitatus ST. JOHN & WORTHBN. 



Xystrodus imitatus St. John & Worthen, 1883: Geol. Sur. Illinois, vol. 

 VII, p. 180, pi. viii, figs. 2a-c. 



Horizon and localities. Lower Carboniferous, Saint Louis 



limestone : Saint Louis. 

 G 17 



