Pe Ag eX XX 
C@LOSTEUS FEROX, Newb. (p. 190). 
Fig. 1. Dentary bone, inside. 
2. Dentary bone, outside. 
3. Dentary bone, upper side. 
4. Weathered section of tooth, showing plications at base. 
All natural size. Saint Louis limestone, Alton, Ill. 
300 
