42 
Thoday . — Anatomy of the Ovule and Seed in 
covering. The section shows the great width of the lower expanded part of 
the now hollow flange. 
D 
Text-fig. 2. Drawn from mature seed of G. Gnemon , 3 cm. long, described in text. A is 
the whole seed enclosed in inner and middle coverings seen in situ , with half the outermost covering 
pared away to show the top part of the micropylar tube, the stopper (s), in which p is the closing 
tissue, and G the gap out of which the beak (B), the bottorp part of the micropylar tube, has been 
torn. C is the outermost covering, o the angled outer integument composed of an inner hard 
layer and an outer soft layer, the latter expanded at Sh over the shoulders of the seed ( x 5). 
B is the apex of the outer integument looked at from above, showing the beak (b) projecting fiom 
a depression (x 5). C is drawn from the median section of B. The nucellus, filled with 
endosperm, is seen enclosed firstly by the inner integument (i), parenchymatous below (dotted area) 
and lignified above (blackened beak) ; secondly, by the tip of the outer integument, with its expanded 
soft outer layer ( sh ) and stony inner layer ( st ) (xio). D is the apex of A more highly mag- 
nified (x 18), and show's the tip of the outermost covering (c) with the stopper. Af and Bf corre- 
spond to the upward and downward growing flanges of the micropylar tube in Text-fig. 1. m.t. -— 
the tip of the micropylar tube ; p =*= closing tissue t G == gap ; v.b„ = vascular bundle. 
Text-figs. 2 B and C are taken from the apex of the middle covering 
(outer integument) of the same ovule, and show the broken portion of the 
micropylar tube (B) projecting upwards, both as seen in the solid object and 
