PLATE 21 



1 







1. Mandible of .1fnrrei-f>,-/,>H (A-<;/// Mo. .die, from the Linton. Ohio, Coal Measures. 



Original in American Mu^-urn of Natural Historv, Xo. 2934. X 0.6. 



2. Portion of the skull of Macrcrpi-lon ileani Moodie, possibly of the same individual 



as the mandible. From the Linton, Ohio, Coal Measures. Original in 

 American Museum of Natural History, No. 3535 G. X 0.4. 



3. Type of Cercai-ii->inorfihn* f>an'iacfitaiiii<: Cope, from the Linton, Ohio, Coal 



Measures. Original in American Museum of Natural History. X 1. 



4. An additional specimen of Cercariontorfihiis paruisquamis Cope, from the Linton, 



Ohio, Coal Measures. Original in American Museum of Natural History. X 1. 



5. Skull of Saumpli'itra vittrllata Newherry. From the Coal Measures of Ohio. X 1. 



6. Tooth of Mastodonsaurus sp. indet. of the Carboniferous of Kansas. Original in 



University of Kansas Museum. X 1. 



7. Tooth of .V<7f/r></oww7//rtf? *i an tiff tit Ineerer. from the Triassic of Germany. 



Introduced for comparison -vith the tooth from the Kansas Carboniferous. XI . 



