Slopes. — The Missing Link in Osmundites. 61 
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DESCRIPTION OF PLATE II. 
Illustrating Dr. M. C. Stopes’s paper on the Missing Link in Osmundites. 
All photographs are enlargements of sections of Osmundites Kidstoni , sp. nov., and were taken 
by Mr. P. Dollman. 
Photo 1. Transverse section showing the packed leaf-bases. The meristeles, sclerotic zones, 
and also adventitious roots can be seen, x 3 (from Slide V. 12641 e = T. 9). 
Photo 2. Transverse section of the protostele of axis, showing the solid tissue. The apparent 
gaps and breaks are due to vagaries of fossilization which darkened some walls and left others trans- 
lucent. Note the seven small bays of secondary wood, the large-celled sheath, x 80 (from Slide V. 
12641 g — S. 1). This corresponds to Ain Photo 5. 
Photo 3. Transverse section of the same axis as above with an interval of two slides between. 
The seven bays of secondary wood and the somewhat stellate shape of the protostele show more 
clearly. x 80 (from Slide V. 12641/; = S. 4). This corresponds to A in Photo 4. 
Photo 4. Transverse section of leaf-bases surrounding axis, A. The latter is that shown in 
Photo 3. x 3. 
Photo 5. Transverse section of leaf-bases surrounding axis, a. The latter is that shown in 
Photo 2. x 3. 
Photo 6. Single leaf-base enlarged, showing the simple curved meristele embracing two patches 
of sclerenchyma and surrounded by the sclerized ring, x 20 (from Slide V. 12641^ = T. 4). 
Photo 7. Slightly oblique transverse section of adventitious rootlet, .showing its diarch nature. 
X 20 (from Slide V. 126 + 1 e = T. 6). 
