490 
x 
Fig. 
ON THE STRUCTURE OF LAGENOSTOMA OVOIDES. 
27. Transverse section across the body of the seed near its base, showing the thin- 
walled type of preservation of the fibrous layer, the slight angling of the shell, 
and the eight vascular bundles—some of which are in situ. Б. 22, x 24. Parts 
of this section are shown enlarged in fig. 2 and photo 28. 
. Piece of fig. 27 near “ sp." enlarged. Shows bundle in situ and germinating spores. 
В. 22. x 129. 
29. Transverse section across the canopy and lagenostome to show the structure of the 
"Lh 
lagenostome wall. M.755. x 83. The central cone has been dragged down- 
wards, so that only the “ stopper” is eut through. Cf. fig. 34. 
. Part of fig. 29 between reference lines Zw. enlarged to show wall of lagenostome in 
greater detail. М. 755. х 154, 
. Germinating spores of figs. 27 and 28 enlarged. R.92. x 250. 
. Upper part of oblique longitudinal section cutting the plinth tangentially. В. 49. 
x 63. 
. Central part of plinth in fig. 32 enlarged to show detail. The dark mass below is 
probably fungal in origin. В. 49. x 940.1 
. Upper portion of oblique longitudinal section showing apical grooves, in one of 
which a pollen-grain is seen. К. 30a. x 45, 
