Bower.-—Studies in the Phytogeny of the Filicales . 499 
actually seedlings, or else stunted forms which retained or repeated the 
juvenile characters. These served for comparison with the youngest leaves 
available of Cheiropleuria , or the seedling leaves of Platycerium. Text- 
figs. 3, a~d are from Dipteris conjugata . They show that the reticulate 
Text-fig. 2. Part of a pinna of 
Dipteris Lobbiana , showing the venation, 
and its relation to the sori. x 6. 
Text-fig. 2 bis. Part of the lamina 
of Dipteris conjugata , including two of 
the main veins, and showing the venation 
between them, and its relation to the 
sori. x 6. 
Text-figs. 3, a-d . Juvenile leaves of Dipteris conjugata, showing successive states of complexity 
of outline, and of venation, x 6. 
