Further Notes on Floral Structures. 



11 



elled up in their much enclosed position instead of being early 

 disengaged after pollinial growth. In the eight other axes 

 growth had continued well beyond the disk dehiscing stage 

 so evident in figure 2 B ; though the basal collar is always dis- 



FlG. 1. 



Fig. 1. Cycadeoidea Marshiana. x 1/4. 



From Minnekahta, South Dakota ; Yale Collection No. 3. — View showing 

 drill holes, and a small cavity at B due to breaking away or non-conserva- 

 tion of a small branch. 



The larger drill hole yielded the core from which was cut the sections of 

 figures 5 and 6, and the smaller beneath the cavity B the bisporangiate 

 strobilus of figures 2, 3, and 3 A. The arrows, some fourteen in number, 

 locate various additional bract-enclosed axes, and many others are present. 

 It appears that most if not all of these fruits belong to a single fertile period, 

 the fruits being in some preembryonal stage. 



