DISTRIBUTION AND RELATIONSHIPS OF THE CYCADEOIDS 
or as trees with a habitus not unHke some of the araucarians, the Brazil 
pine for instance. The point is all but proven, despite the fact that the 
actual histologic structure awaits fortunate discovery. By any fair analogy 
the pith must be little or no more developed than in young magnolia shoots, 
or in cone-bearing branches of araucarians ; while the wood structure could 
not have been very different from the cycadeoidean type. Furthermore, 
Fig. I. Williams oniella coronata, horn the mid-estuarine series of the mid- Jurassic 
of the Yorkshire coast (at Gristhorpe). From the restoration of Hamshaw-Thomas. 
P, branch-end with flower-buds; F, a single flower enlarged twice. The central cone of 
the flower is surrounded by a whorl of synangia-bearing scales. 
along with the small branches go small leaves, and the small perfect flowers, 
just as suggestive of forest types as those of the tulip tree. Evidence fails 
