PLATE 23 



1. Left leg and pelvis of IchthwunlliKs f>l,it\>f>ns Cope, from the Coal Measures of Ohio. 



X 1.7. Original the property of the Department of Geology of Columbia University. 

 r=centrale; /"=fibtila;yf=ribulare; /v=femur; z=intermedium; //=ilium; 7~=tibia; 

 /, /-5=distal tarsalia; /i'=tibiale; F=caudal vertebrae; /-K=digits. 



2. Ventral scutella; of Ctencrfteton alreolalum Cope, from the Coal Measures of Ohio. X 3.5. 



Original in U. S. National Museum. 



