THE LEAR 
29 
An Entire margin is even and smooth, like Fig. 10. 
A Seriate margin has sharp teeth pointing for¬ 
ward like a saw (see Fig. 11). 
A Cre'nate margin has broad, rounded notches, 
like Fig. 12. 
A Den / tate margin has sharp teeth pointing out¬ 
ward. Figs. 13 and 14 are different forms of Dentate 
margin. 
Fig. 13. Fig. 14. Fig. 15. 
In Rep and' (Wavy) margins the edge curves out¬ 
ward and inward, as in Fig. 15. 
Fig. 16. Fig. IT. 
Each of these different kinds of margin varies in 
many ways. 
Figs. 16 and 17 show the serrate and crenate man 
