of the Anatomy of the Genus Selaginella , Sfr. 141 
structure.) De Bary adds that ‘ the course of the bundles and 
the insertion of the bundles of the leaves have not been 
investigated in those shoots which have other than one axile 
bundle or two lateral ones.’ 
In Janczewski’s monograph (17) on the structure of sieve- 
tubes some details are given of the structure of these elements 
in 5. Martensii . De Bary had remarked (16, p. 182) that 
‘ the position in which the sieve-tubes occur in the above 
instances (Ferns) is occupied by elements of similar form and 
general character of contents and walls, but without distinct 
sieve-plates or sieve-pores.’ Janczewski gives an accurate 
account of the structure of the vascular system of *S. Martensii , 
and shows that genuine sieve-tubes with sieve-plates do exist 
in the situation indicated by De Bary. My observations on 
many species entirely agree with those of Janczewski. 
Bruchmann publishes a short account (18) of his researches 
on *S\ spimtlosa i A.Br., in which he states that the apical 
region of the stem and branches is occupied by a group 
of cells, not a single cell as Treub had demonstrated for 
>S. Martensii. The first branching of the embryo of this 
species is, according to Bruchmann, a true dichotomy, but 
all subsequent branchings are monopodial. It is curious that 
all anatomists who have investigated 5. spinosa , P.B. (S. spimt- 
losa , A.Br.) seem to have missed the very peculiar alteration 
which the stele undergoes in the transition from the creeping 
to the erect axis. 
Haberlandt publishes an exhaustive treatise (19) on the 
structure and development of the chlorophyll-bodies of the 
genus, to which I need not at present refer beyond saying 
that the completeness of his work enables me to omit detailed 
description of the chloroplastids in those layers of the stem 
which contain them. 
A short note by Leclerc du Sablon (20) recurs to the ques- 
tion of the homology of the cuticularized cells which arise 
from the limiting layers of the vascular cords. He expresses 
it as his opinion that these cells form a genuine endodermis. 
In the same year and in the same journal Vladescu pub- 
