92 



STORY OF THE REPTILES 



These Professor Cope called " TJieromorphs " or 

 beast-forms, because their teeth were so very much 



Fig. 48. — Dicynodon lacerticeps. 



like those of some modern mammals (or beasts). The 

 grinding teeth here first began also to show cusps or 



more points than one. Lce- 



FiG. 49. — Lycosaurus. 



laps^ a terribly clawed carnivorous fossil reptile, had 

 teeth that were serrate (saw-toothed). 



In the crocodihans, the teeth grow much as in 

 some of the old monsters. They come up out of the 



