of Schizaea tnalaccana . 495 
£ 4-8 inches long, weak, flexuose, subterete.’ They are also 
said to be ‘ channelled,’ but this is probably mainly due to 
drying, as the transverse section of the frond is oval-oblong 
usually with no distinct groove, though there is sometimes 
a slight concavity on the morphologically upper surface. 
There is no differentiation into petiole and lamina, the whole 
length of the frond being perfectly uniform externally. The 
fertile fronds bear at the apex a few crowded fertile pinnae, 
the two rows standing out on one side parallel to one another 
and nearly at right angles to the axis of the frond, forming 
a kind of double comb (PI. XXV, Fig. 1), When ripe the 
pinnae frequently come to stand out on each side of the axis 
in one plane (Figs. 1 and 2). The sporangia are borne on the 
inner (morphologically lower) side of the pinnae, and lie in two 
acropetal rows, one on either side of the midrib of each pinna. 
In structure and development they correspond so closely with 
those of S'. Pennula as described by Prantl 1 , that it has not 
seemed worth while to give details. 
Four countings were made of the number of spores in 
a sporangium, and the results were 90, no, 112, 115* These 
come fairly close to the typical number 128, and agree well 
with Professor Bower’s results for the order 2 . 
The Anatomy of the Stem. 
The plan of structure of the stem in the present species is 
usually on a smaller scale than in the other species that have 
been described (S'. Pennula by Prantl 3 , S. digitata , dichotoma , 
and fistidosa by Boodle 4 ). 
The cortex, apart from leaf-bases, is only four or five to 
eight cells thick. It consists of rather large, not particularly 
thick-walled cells, which are frequently packed with starch 
grains, and always contain a good deal of mucilage. 
1 Untersuchungen zur Morphologie der Gefasskryptogamen. Heft 2. Die 
Schizaeaceen, 1881. 
2 Studies in the Morphology of Spore-producing Members. IV. The Lepto- 
sporangiate Ferns, Phil. Trans., 1900. Professor Bower found 128 the typical 
number for one species of Lygodium , for Anemia and for Mohria. 
3 Op. cit. 4 Op. cit. 
