sie 
BALBIANIA IN VESTIENS. 221 
But the authors think that perhaps this result is due to faulty rea 
ratus. Another experiment under the same mecirton’ as the last, bu 
in which Veronica was substituted for Ivy, ga 
cub. cms. 
Amount of original Nitrogen. _.. ‘ ‘ 22°1 
final Carbonic Acid . : a 16 
ij », Oxygen ‘ : ary 0°1 
Sy , Nitrogen .. ‘ é 20°4 
And another (still with Veronica) showed— 
cub. cms 
Amount of original ea ‘ ¥ é 20°3 
final Carbonic Acid. : i 0°8 
5 » Oxygen ; ‘ ‘ ‘ 00 
Nitrogen : 
The re ites obtained are a, sotifirinktaey of De Saussure’s 
experiments on respiration. Itis to be hoped that the authors wi 
continue their work in this direction S. M. 
BaBIANIA INVESTIENS. 
Le Balbiania investiens ; étude of sg eg ae f ia ye M. 8. 
Srropor. (Ann. des Sciences Nat. v e, tome 1il 6.) 
Tuts paper is devoted to the life-history of the red lige first figured 
. by Hassel as Batrachospermum digi and afterwards referred to 
Chantransia by Lenormand, who discovered that it was an epiphyte 
living interlaced among the filaments of its Batrachosperm- host. The 
result of the author’s labours is to reveal a most interes case of 
alternation of generations, as well as a certain difference from Chan- 
transia which, he considers, justifies the foundation of a new genus. 
nation throws out both an ascending and descending axis, from all the 
_ cells of which (as well as from th le itself) branches are given off ; 
these branches either become interlaced with the ramifications of the 
host or else form part of the differentiated thallus, which consists of 
lindrical articulated filaments bearing tT side -branches (sporu- 
to the trichogyne in the ordinary way, but the result of fecundation is 
not an 1 ordinary cystocarp, | but what the author se 4 desmidocarp. In the 
transversely, 
each of the new cells growing and producing oa. and during this 
process the trichogyne is pushed to one side: at last results a ramified 
system, each terminal cell of which benras ae ye Mare 
oospore 
March) takes origin, in 
™~ 
‘Cao ae +h of 
IRC 
* MM. Thuret and ero eh have » quite recently Soci a eg the 
fruit of hes Aa corym 
midocarp of Balbiania (Notes t Miachigitute, t. 6). 
