of the Anatomy of the Genus Selaginella , Spr. 161 
WojinowE (23, p. 7 ) finds that the epidermis is provided 
with strongly developed hairs, which he says appear to be 
characteristic for the species. He says he found none on 
5 . Braunii , amongst others, which he examined in this rela- 
tion ; but that species has well-developed trichomata, and it is 
by no means exceptional in this respect. Wojinowid finds 
two kinds of hairs on vS. lepidophylla , one type being uni- 
cellular and the other multicellular. I have examined care- 
fully all the material of S. lepidophylla I possess, and have 
failed to find either the one or the other ; I am the more 
astonished at this since his paper seems to me to bear 
evidence of careful observation. Can he have made the 
mistake of imagining that the hairs on the decurrent bases 
of the leaves were cauline in origin ? Otherwise I am forced 
to believe that we are working on different species. In that 
relation I may add that S. lepidophylla is an easily recognized 
species, and that my material was derived from two sources, 
the Royal Gardens, Kew, where the naming is on the authority 
of Mr. J. G. Baker, and from the Strassburg Botanic Garden, 
the material in that case being named for me by Professor 
Dr. Kuhn, of Berlin. 
20. Selaginella Helvetica , Lk. Baker’s Handbook, No. 14. 
This European species has the normal arrangement of 
protoxylems and dorsal cords, the latter remaining for some 
distance distinct from the marginal strands. The epidermis 
is not well marked, and the hypodermis merges gradually into 
a thin-walled cortex whose innermost layers form a distinct 
reticulum with intercellular spaces. The trabeculae consist 
of strings of oblong or rounded cortical cells stretching across 
the lacuna, and articulating with short hourglass-like endo- 
dermal cells. The pericycle is one or two layers thick, and 
its cells contain much red colouring-matter, as do also the 
cells of the outer cortex. One or two layers of sieve-tubes 
occur dorsally and ventrally. The sieve-tubes have very long 
bevelled ends. Two or three layers of parenchyma separate 
the sieve-tubes from the xylem. The sieve-tubes are absent 
opposite the margins of the stele. 
