384 



FII.ICALES 



[CH. 



like those of Dipteris conjugata (fig. 231); there are no indi- 

 cations of the existence of the two curved arms at the summit 

 of the petiole which form so striking a feature in D. exile and 







Fig. 283. Dictijophyllum rugosum (Lind. and Hutt.)- (Brit. Mus. Nat. size.) 



