Sahni . — On an Australian Specimen of Clepsydropsis . 85 
pinnae and aphlebiae, though these could not definitely be made out. On 
the polished faces the characteristic petiolar strands could be observed in 
several of the leaves, and when the surface was covered with a thin layer of 
oil, with the help of a lens the course of the roots and petiolar strands could 
be traced for some distance into the transparent siliceous matrix. 
Text-fig. 1 is a diagram to show the fossil in plan and elevation; the 
outlines of the plan were drawn from the lower end of the fossil. The 
block was first cut into two pieces along XX, ancf from the left-hand piece 
the two transverse sections T 1, T 2, and the three longitudinal sections L 1, 
L 2, L 3 were prepared. Subsequently two transverse sections ti^ti were 
prepared from the right-hand piece. The original specimen is therefore 
now in four pieces, A, B, C, D, besides a fragment left over after levelling one 
of the ends. In the figure the petioles are marked with numbers to corre- 
spond with those in Text-fig. 2. 
The orientation of the petiolar strands (indicated by short straight lines 
in Text-fig. 1) shows that the leaves are arranged in their natural positions 
round a stem which is, however, missing. The longitudinal sections show 
the petioles sloping inwards towards the stem side, but from the low angle 
