Kershaw.—A Fossil Solenostelic Fern. 
691 
Fig. 3. Photograph of the rhizome, showing leaf-gap with one margin considerably thickened, 
and the beginning of the lateral branch. 0. c., outer cortex ; i. c., inner cortex (crushed); r ., rootlet 
in cortex (enlarged in Fig. 8). Other lettering as in Figs. 1 and. 2. (Slide I ya 21). 
Fig. 4. Photograph of the rhizome, showing main stele with leaf-gap still open, and the stele of 
the lateral branch now separate. (Slide I ya 22.) 
Fig. 5. Group of xylem elements, showing pits between adjacent vessels. 
Fig. 6. Diagram of the probable relation of stele, leaf-trace, and lateral branch at a node of 
Solenostelopteris japonica. 
Fig. 7. Drawing of stele of rootlet which is about to become separate from the solenostele. 
Fig. 8. Rootlet in cortex; the stele surrounded by endodermis but with no cortex of its own. 
