388 Boodle. — Anatomy of the Schizaeaceae. 
the periphery. This structure might be taken for that of 
a small species of Lygodium , if it were not for the presence 
of a quite small excentrically placed group of parenchyma 
or other soft- walled tissue. Unfortunately this was partly 
disorganized and its nature could not be determined. In 
the petiole of this species the bundle is like that of Anemia 
Phyllitidis on a small scale, but differs as to endodermis and 
one or two other points. The xylem forms a V-shaped arch, 
the ends of which are slightly incurved, hardly hooked. There 
is a median protoxylem placed just as in A. Phyllitidis , and 
two other groups in much the same position as in that species. 
The phloem is slightly interrupted at the ends of the xylem- 
arch, but forms a layer covering the rest of the outside of it, 
and on the inner side of it reaches about a third of the way 
up towards the median protoxylem. Several fibres, apparently 
formed from sieve-tubes, occur in the phloem ; a few above 
the top of the arch and more numerous ones near the ends of 
the xylem. There is a thick pericycle, and the endodermis 
does not dip into the concavity of the arch, but has a rounded 
outline. 
The structure of Anemia aurita was not examined by Prantl, 
but he investigated some of the other species included by him 
in Aneimiorrhiza , and described the tubular stele as occurring 
in them. Robert Brown (’38-52, p. 2 ) mentions having ob- 
served a complete circle of scalariform tracheides in the stem 
of some species of Anemia. 
The occurrence of a solenostele-like stelar tube in one group 
of species, and of the dialystelic structure in the remainder, is, 
as Prantl states, connected with the fact that the leaves are 
distichous and not crowded in the first case, but polystichous 
and crowded in the second case. 
Anemia, seedling. 
Several series of microtome sections were made of seedlings 
of Anemia Phyllitidis , but on account of the difficulty of 
penetrating the sclerotic tissue with paraffin and of cutting it, 
most of these were incomplete. However, by comparing one 
