278 Scientific Intelligence. 
cilia like those of the Fucacee, and moving wisi in the same man- 
ner. is observations upon the cundation of Fucus vesiculosus 
confirm those of Thuret. Dr. Pviigetiche ais also found indications of 
bisexual reproduction in the green fresh-water Alg@; and in Vaucheria 
he thinks he has confirmed Vaucher’s original idea that the ‘horns’ 
perform the function of anthers. ‘These, according to his researches, 
are really berger their contents being converted into minute vesi- 
cles, the +4, of a line in diameter, furnished with two unequal cilia, by 
which, when set free by the bursting of the horn at the apex, they move 
rapidly in all directions, ‘* great numbers (twenty, thirty or more) mak- 
ing their way into the opening of the spore- -fruit, and coming into con- 
tact with the tough mucilaginous layer bounding the contents. era 
spermatozoid sa a uent sige of the cell-membrane of the 
s ie i eim maintains here emoir on the 
structure of sha cell in plants, that Ne primordial utricle of Mohl, the 
protoplasmic layer, does use the coat of cellulose or permanent 
cell-wall to be formed upon its surface, as Mohl maintains, but be- 
comes actually transformed into the cellulose coat! We wait ake or 
how Mohl will regard this view. 
2. Trécul; Formations Secondaires dans les Cellules Véebealéeies 
An elaborate memoir, in Ann. Sci. Nat., ser. 4, vol. ii, illustrated by 
numerous figures, of which the principal conclusions are ; that the vege- 
table cell can produce secondary formations or deposits on the outside 
as well as the inside of the primary membrane; some thickening in 
one way, some in the other, and some in both ways ; that the spiricules, 
reticulations, rings, &c., are originated by the primary membrani 
which pre i 
branes are not due to sedim entary m matte npc by the is 
contained i in the cells; and that the cavities “igh co ntiguous wood 
tte last, is reproduced by Henfrey, in an English translation, i 
g. Nat. Hist. for May and June, 1855. With the thor- 
rr which shicnewriebe Prof. Mohl’s researches, he first combats, 
apparently with complete success, Nageli’s view of the utricular nature 
of chlorophyll- granules, showigg that they have no’ investing mem rane 
istinet from the contents, still less a cellulose coat com mparable with the 
cell-membrane. He still believes that the grains of chlorophyll! do not 
belong to the ternary series of producis: at all, but consist of a soft 
or more starch-grains are imbedded, and which owes its green hue hue 
the iene of an extremely small quantity of green coloring matter, 
seemingly only or principally in its outer layer. By demon- 
