578 Davey. — Seedling Anatomy of certain A menliferae. 
for the Urticales and also for the Piperales described in the works of 
T. G. Hill 1 and of A. W. Hill . 2 
COTYLEDONS HYPOCOTYL • ROOT 
Fig. i. Diagrams illustrating modifications of the diagonal type. 
Since, however, so many of the earlier cohorts supply only a limited 
range as regards number of forms, comparison of this kind with the large 
groups described by other authors is of little value except perhaps in the case 
2 Hill, A. W. : Ann, of Bot., vol. xx, 1906. 
1 Hill, T. G. : loc. cit. 
