VERTEBKATES. 263 



PAGE. 



DELTODUS, Agassiz, - - 141 



latior, St. J. and W., Keokuk, 145 



cinctulus, St. J. and W., Warsaw, - - 146 



trilobus, St. J. and W., Warsaw, - 148 



occidentalis, (Leidy sp.), Keokuk, - 150 



parvus, St. J. and W., St. Louis, - 151 



intermedius, St. J. and W., St. Louis, - 153 



Powellii, St. J. and W., Upper Carboniferous, 154 



propinquus, St. J. and W., Coal Measures, - 156 



DELTODOPSIS, St. John and Worthen, - 158 



affinis, St. J. and W., Warsaw, - - 160 



St. Ludovici, St. J. and W., St. Louis, - 161 



angustus, (N. and W. sp.), Chester, - - 163 



? convolutus, St. J. and W., Upper Burlington, 165 



? inflexus, St. J. and W., Keokuk, - - 167 



? exornatus, St. J. and W., Warsaw, 168 



PSAMMODONTID^, L. DE KONINCK. 



PSAMMODUS, Agassiz, - 197 



Springeri, St. J. and W., Upper Burlington, - - 202 



tumidus, St. J. and W., Upper Burlington, - 205 



turgidus, St. J. and W., Upper Burlington, - 206 



Lovianus, St. J. and W., L. and U. Burlington, - 207 



glyptus, St. J. and W., Upper Burlington, - 209 



grandis, St. J. and W., Keokuk, - 211 



plenus, St. J. and W., St. Louis, - 213 



ccelatus, St. J. and W., St. Louis, 217 



crassidens, St. J. and W., St. Louis, - 218 



angularis, N. and W.. Chester, - 222 



reticulatus, N. and W., Chester, - 224 



COPODUS, Agassiz, - 227 



Van Hornii, St. J. and W., St. Louis, - 229 



pusillus, St. J. and W., Chester, - 231 



