i 7 6 



BRITISH FERNS 



F g. 1 98. P. 1: auritum dentatum. 



Fig. 199. P. v. bifidum 

 (obtuse form). 



Auritum dentatum (Fig. 198). — Found by Mr. C. Monkman 

 near Boness ; a form of auritum with saw-toothed pinna?. 



