292 TRAXSACTIONS AND PROCEEDINGS OF THE [Sess. lxiv. 



The solitary terminal cone of Fig. 2 has two lateral 

 branch cones both on the same side, the one coming off 

 a little above the other. The axis bears a little above the 

 middle of its length one branch on the right, consisting 

 of a small lateral cone on a long stalk. 



Fig. 3 shows a variation on Fig. 2. 



The two branches of the terminal cone arise on different 

 sides, and at slightly different levels. The axis bears half- 

 way down a long-stalked cone as a lateral branch. 



The axis in Fig. 4 bears three cones, a solitary terminal 

 on a short stalk, and two lateral sessile cones at the same 

 level on opposite skies and just below the base of the 

 terminal. 



Fig. 5 is somewhat similar to Fig. 4, except that the 

 lateral cones are both stalked, and originate at different 

 levels right and left of the terminal, the left cone being 

 longer stalked than the right. 



In Fig. 6 the axis bears three cones, a terminal and 

 two laterals, all with well - developed stalks, the two 

 laterals right and left and about the same level below 

 the terminal.. An interesting point here is that the 

 axis of the terminal cone has continued its growth, and 

 bears a small tuft of sterile sporophylls having the 

 characters of ordinary foliage leaves. 



Fig. 7 is instructive when compared with Fig. 2. 

 The terminal cone has two lateral branch cones on the 

 right, the upper nearly half an inch above its base, and 

 the lower just below the upper one. The lower lateral 

 cone arising on the axis in Fig. 2 is represented here 

 by a lateral branch bearing ordinary foliage leaves. This 

 is to be regarded as a completely sterilised cone, the 

 sporangia having aborted, and the sporopliylls being 

 transformed into foliage leaves. 



Fig. 8 should be compared with Fig. 7. The axis 

 bears at its apex two normal cones. Near its base, in the 

 same position as the sterile cone of Fig. 7, is a long 

 branch bearing an ordinary cone of average size. 



The next four examples (Plate II.), along with Fig. 7 

 (Plate I.), form an instructive series, as they show stages 

 of progressive sterilisation of the whole strobilus. 



]n Fig. 9, at about tlie middle of its length, the stro- 



