33 ° 
T. G. Hill and E. de Fraine, 
As the transition-phenomena obtaining in the polycotyledonous 
Pcrsoonia lanceolnta are parallel with those of Conifers a brief 
analysis only is required. 
1. Seedlings with three cotyledons and a triarch root (series A, 
B and C). 
Three examples were examined and in all the vascular bundles 
of each seed-leaf organized one pole of the triarch root-structure. 
Each seed-leaf may therefore be considered as a whole-cotyledon. 
2. Seedlings with four cotyledons and a tetrarch root (series D, 
E and F). 
The details of the transition were exactly the same as in the 
previous series. Each seed-leaf corresponds to a whole-cotyledon. 
3. Seedlings with four cotyledons and a triarch root. 
Series G. This seedling formed a transition between the two 
previous groups, for one cotyledon was split almost entirely into two 
halves (Diagram 1, Figure 1), and was traversed by two vascular 
bundles which remained distinct one from the other throughout the 
whole length of the cotyledon (Diagram 1, Figure 1, a and h). 
Within the hypocotyl these two strands together organized one pole 
of the triarch root (Diagram 1, Figures 2, 3 and 4): on the other 
hand the bundles of the other seed-leaves (Diagram 1, c and d) 
behaved quite normally and are therefore classed as whole cotyledons. 
This seedling thus provided an example which shews the origin of 
two seed-leaves by the longitudinal fission of one. 
Series H. This seedling resembled the previous one very 
closely, with the exception that one cotyledon had entirely divided 
into two; the vascular strands of the two half-cotyledons, in the 
upper region of the hypocotyl, rotated towards one another and 
together formed one pole of the triarch root-structure. The bundles 
of the other seed-leaves behaved in a normal fashion (Diagram 1, 
