793 



PSEPH. 



Vol. 7, 1883, page 69, plate 2, selected fig. 5a, mature right 

 upper jaw tooth, crown; 5. inner edge; 6 <z, 5, small tooth; 

 7 a, longer upper left jaw; 8 &, short middle upper left jaw 

 tooth, crown much worn in front (original specimen of Helo- 

 dus placenta.) ITinderhooJc, Burlington, Iowa. X7. 



Psephodus reticulatus, St. John and Worthen, Geo. Sur. 



111., Vol. 7, 1883, page 417, plate 6, selected fig. 19«, very large 

 back tooth, back face ; 5, outer face ; <?, outline of crown seen 

 from above ; d^ profile section ; 20 «, medium size tooth, inner 

 face, J, opposite face ; (?, profile section; 21 J, smaller tooth, 

 net-work ornamentation restricted to the basal border ; 22^, 

 worn tooth without ornamentation, crown ; 23 a, hind face of 

 small tooth; 24 a, 5, hind and outside faces of small tooth, c, 

 profile outline. Kinderhook limestone, Iowa. XI. 



Psephodus symmetricus, St. John and Worthen, Geo. 



Stjy^ M/, Geol. SIL Mil. MA, 

 Sur. 111., Vol. 7, 1883, page 71, plate 1, figs. 6 a, 5, c, d, tooth 

 from right upper jaw, from the Kinderhook lower Ush-led ; 

 7 a, 5, c, <^, enlarged, a very small nearly entire tooth from the 

 left lower jaw, 'w^^ef^^^A-J^c?. Burlington, Iowa. XI. 

 Pseudocrania anomala, Winchell. VIII c. (S. A. M.) 



Pseudomonotis hawni, Meek & Hayden. See on page 



796 helow. 



