374 THE DIGESTION OF ALBUMEN (PERISPERM). 
it can also undergo a period of rest lasting at least over ps a of 
production, becoming in this case harder, fla tere d, and hexagonal, 
with local thickenings on the sides and rou the ma ay e 
isospore produces the vegetative plant as the foenlt of its germination, 
whether this be immediate or takes place after the rest-period. 
Careful distinction is drawn between primary and subsidiary 
vegetativ and spores with sexual the latter the 
chief place i # be n to division (constriction) and zoospore-for- 
mution in vegetative plants, these processes forming an integral 
part 
of the first asexual generation: the transformation of the vegetative 
plant into an ordinary zoosporangium is secondary among subsidiary 
phenomena and massing of the plasma in the root of the ordinary 
et, saa 255 with the resulting processes tertiary. 
g the vegetative plants usually develope ork —— 
ba py , thus. dividuals 
and their diffusion over a wid In s summer, on al contrary, 
they are chiefly engaged either in dacibon or in spore-formation. The 
plant with its extraordinary number of processes furnishes us with 
an extreme case of adaptation to external conditions, and it 
o to prove mos’ ful for teavtii g purposes. 
author constitutes Botrydium as the of a_ tribe 
type 
cos aad of Jsosporee equivalent to Pandorinee and Hydro- 
Tae DieEstion or ALpumEN (PERISPERM). 
Sur la sadatear sd ? Albumen. Par M. P.h. van Treeuem. (Annales 
Sciences Naturelles, 1877, p. 180.) 
In order to ascertain the way in which the assimilation of albumen 
takes place, the anthor isolated the fleshy albumen of Ricinus, the 
mealy albumen of Mirabilis and Canna, and the horny albumen of 
Aucuba and Phenix, and placed them under suitable conditions for 
culture. With Riciaus swelling of the mass occurred after some days, 
gradually diss 
amorphous covering first sepin wrint roe the seceroa and crystal- 
loid becoming disassociated and dissolving in This solution of 
aleurone began first in the davdadhestal ae of both sides, at the 
same time the oil slowly diminished in quantity as well as the dry 
matter of the album Prec ew su es formed were starch—the 
occurrence ¢ | 
contrary, remained 1 
Under normal sceudihicins of germination the result with Ricinus 
serene ema s formed, Ss Phat see nation. sen much more rapid 
