392 Miscellaneous. 
Leucodore calearea. 
To the Editors of the Annals and Magazine of Natural History. 
GrentLEMEN,—Allow me to draw your attention, and that of your 
readers, to the figure of Leucodore calcarea appended to my paper 
last month. I have to apologize very greatly for its erroneous and 
sketchy appearance. ‘The sete are by no means correctly indicated, 
whilst the great branchial cirri, which curve over the back, are 
omitted altogether. This is owing to illness, which prevented me 
from seeing to the proofs of the plate. The figure given by Dr. 
Johnston originally, I believe, in this Magazine, and republished in 
the ‘ B. M. Catalogue of Worms,’ is a very fair representation of his — 
Leucodore ciliata, which I must refer to as a correction of the erro- 
neous one in my plate. Since my paper did not deal with the 
morphological peculiarities of Leucodore, the figure was only of 
secondary importance. 
I am, Gentlemen, truly yours, 
E. Ray Lanxester. 
On the Growth of the Stem of Fontinalis antipyretica. 
By Professor H. Lerrexs. 
The apical growth of this moss takes place by repeated divisions of 
a three-sided apical cell. The divisional walls are parallel to the 
lateral surfaces of the apical cell. ‘The spiral of division is as often 
directed to the right as to the left. The segments cut off from the 
apical cell by the divisional walls are arranged, in accordance with 
their origin, in three longitudinal series, and at first incline towards 
each other at an angle of about 70°. ach segment is divided by 
a longitudinal wall into an outer and an inner part. The inner part 
of the segment, which subsequently becomes horizontal (the stem- 
part of the segment), displays in general the same development as 
the segments in the roots of many vascular Cryptogamia and in the 
stem of Hquisetum. Itis divided by the sextant-wall into sextants, 
in the larger of which an inner cell is cut off by a tangential wall. 
From the stem-part of the segment is formed the widely cellular, 
axile tissue of the stem. © 
The outer part of the segment (the leaf-part) partially retains 
its inclined position. It divides by a horizontal wall into the acro- 
scopic and the basiscopic basilar portion. The former grows out into 
the free leaf-surface, a two-edged apical cell being formed in it. 
From the basiscopic basilar pieces the buds are developed. Hence 
each bud and the leaf standing above it belong to the same segment. 
“One wall of the apical cell of the bud is always turned towards the 
apex of the parent shoot. The segmental spiral of the bud is always 
antidromous to the segmental spiral of the parent shoot. The tan- 
gential growth of the basiscopic basilar piece always remains much 
behind that of the acroscopic portion.—Anzeger der Akad. der Wiss, 
in Wien, February 13, 1868, pp. 43-44. 
