of the Anatomy of the Genus Selaginella , Spr. 193 
rate and incomplete. He also groups with this series S. Lyallii] 
that species having the peculiarity of possessing anastomotic 
cords as well. In the first place, I differ entirely from him in 
admitting the legitimacy of the comparison which he has thus 
instituted between an erect secondary shoot of S. Lyallii , 
and the trailing stem and its erect continuation in S. spinosa. 
Further, he seems to have failed to recognize that in 
S. Lyallii there are four foliar cords from the very beginning 
in the erect shoot, each enclosed in its own pericycle and 
endodermis, whilst in S. spinosa there is only one stele with 
several protoxylem-regions. He remarks that the bundles 
are arranged without order in the stem of 5. Lyallii (22, p 245, 
‘ et se dispersent sans ordre dans les tiges’) ; that I cannot 
agree with, and moreover, De Bary had clearly stated long 
previously that the arrangement of the cords was such as to 
form 1 three equidistant rows in an almost quadratic surface ■ 
( 16 , p. 383). 
2. The stem possesses two foliar cords. 
A. These are united by metaxylem into one median stele. 
This, Dangeard remarks, is the most frequent arrange- 
ment, and is due to the fusion of the four original cords 
in pairs. He also remarks on the presence of an anastomotic 
cord in such species. 
B. The two foliar cords may remain isolated. This arrange- 
ment is found, he says, in the articulate species, where, how- 
ever, the cords fuse, as in A, at the points of origin of branches. 
It is necessary to point out that other species than those 
belonging to the so-called 4 Articulatae ’ show this mode of 
arrangement. 
3. The stem possesses three parallel vascular bands. In 
this case Dangeard distinguishes (a) the presence of a median 
stele similar to that occurring in 2. A, and (b) two lateral (sic) 
vascular strands isolated from the median stele at the bases of 
the ramifications. These may become fragmented in various 
ways, as in S. laevigata (= 5. Willdenowii , Baker, non 5. laevi- 
gata, Baker). They bear several protoxylem-strands, and 
exceptionally receive leaf-traces. I have already criticized 
