128 



DICTYOPHYLLTJM. 



main ribs. Both the specimens (Figs. 17 and 18) represent young r 

 or at least small, leaves ; the examples of the form represented in 

 PI. XIII. Fig. 3 belong to much larger leaves. 



FIG. 19. Dictyopkylliim rugosum (L. & H.). From a specimen in the 

 Leckenby Collection, Cambridge (No. 135). (Nat. size.) 



Text-fig. 19. Leckenby Collection, Cambridge (No. 135). 



This specimen is very similar to that of Fig. 17, but interesting 

 as showing part of the main framework of a frond with indistinct 

 traces of the laminar portion, in which the secondary and tertiary 

 veins are sufficiently indicated to enable one to recognize the 

 Dictyophyllum characters. Identified by Phillips in 1873 as 

 Phlelopteris Phillipsi. 



