BOTANICAL NEWS. 255 
The microspores can be best examined after being treated with chromic 
acid, which acts on the exosporium and renders it transparent. Th 
chief interest in Pfeffer's observations on the microspores is the confirma- 
tion of Millardet’s discovery of the rudimentary male prothallium. A 
single sterile cell remaining ; the other cells forming spermatozoids, elon- 
gated bodies, Beep At at one end and armed with two cilia at the other. 
By the presence of this rudimentary male prothallium, the resemblance 
between the small spores of Selaginella ri me pollen grains of Thuja, 
Taxus, and Cupressus becomes still more clo 
The germination of the large spore, the formation of the prothallium 
and archegonia are fully described. The division of the archegonial cell, 
and the vario es i b 
When the embryo attains some size, it is not placed as Hoffmeister figures 
it, but lying transversely across the spore. The position of the archegonial 
opening is marked, and the suspensor indicates its position. The embryo 
is somewhat curved, with a gibbosity kis the suspensor. Pr is the 
t (fuss), and gives the embryo a very peculiar appear Two 
cotyledons, with ligules, are also seen. The em "iecit is evidently “Tike that 
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Botanical ; Hews. 
ARTICLES IN Joona FOR JUN 
ma to onthly Mi reap Journal.—R. Braithwaite, « On Bog-Mosses, 
wi 
deg ar l Maga azine. —W. Thiselton Dyer, “On some Fossil Wood 
from the Lower Eocene” (1 — — A cellular structure 
filling the duets determined to be ty 
Botanische Zeitung.—W. Pfeffer, Le Effects ofthe d of the rr tiae 
on the decomposition of Carbonic Acid by Plants."—Z. v. J nczewski, 
* Comparative me eG into the Modes of Devolopraent: of piconets 
(continued) ebrand, ** On certain Plant-tissues." — wanit; 
Pis the iic of Trma“ (tab. 6).—H. G. Reichenbach, fils Bo- 
nical not 
Flora. H. de Vries. “ On the effect of Pressure on the Vorgiióon of 
Wood. genis Nylander, ** Animadversiones quaedam circa F. Arnold Lich. 
Fragm. XIV. (F lora, pp. 72-78. y F. Schultz, ** Observations on in sind 
of the ri »— S. Kurz, “© Pinus Lalteri, Mason.”—J. M. 
Cetraria ciliaris, “Adr. civis flore Europe. ve x G. Reichenbach fil, 
“ New w Orchideæ, collected by G. Mann. » S. Kurz, “Three new Plants 
from Thibet ” (Parrya pumila, Gypsophila sedifolia, Bellaria tibelica.) 
edwigia.— Reprints, Abstracts, ete. dm 
Bulletin de la Soc. Roy. de Botanique de Belgique, Vom. x. na A 
ganck, ** Histologico-chemica cal Researches - the Au- 
tumnal F Fall of the Leaf ” (pl. 3) € Hn —A. Thielens, Notes a 
some new or rare Plants of the Belgian Flora.” —4. Hardy, DO. 
of the Belgian species of Elatine.” (E. ane L. Z. hexandra, 
