246 
section at the level of the archegonia some fifty bundles 
are to be seen. They run on in the free part of the 
endotesta, but are never observed in the nucellus. 
$ 14 Bowenia spectabilis Hook. 
$ Literature: Kershaw (80). 
Figure: 80 p. 634. 
The strobilus is formed by a compact mass of mega- 
sporophylls, each consisting of a stalk ending in a peltate 
head, bearing an ovule on the underside of each of the 
horizontal extensions. The ovule is attached without a 
stalk to the sporophyll and when ripe has a size of about 
2 cM to 1,8 cM. 
The sarcotesta has a thickness of more than half the 
whole of the testa. It is composed of large parenchym- 
atous cells filed with starch; scattered tannin sacs are 
lying in the hypoderma. À well differentiated epidermis 
is present. 
At the base of the seed the sclerotesta is closed, inter- 
rupted only by the vascular bundle breaking through. As 
in the other Cycads it is composed of two layers of cells. 
Contrary to Cycas and Dioon there is a sharp line of 
demarcation between the innermost cells of the sarcotesta 
and the adjoining ones of the stony layer. 
The endotesta, however, is difficult to separate from 
the sclerotesta, especially in those places where the latter 
is sclerised. 
Nucellus and endotesta are concrescent for three-fourths 
of their height, the beak of the former is put forwards 
in the micropylar tube, which protrudes out of the testa. 
The pollenchamber has been distinguished into a lower 
and an upper one. The latter developing first, serves as 
