3 
BATRACHOSPERMUM, Roth. 
; (Roth.), Ag. Syst.52. Cooke's British Freshwater Alga, 
291. Vaguely branched, 1 to 3 in. long, brownish or bluish-green; 
inferior internodes covered with a dense mass of branchlets; the 
superior naked, or nearly so, apical joints of the branchlets attenuated 
into along bristle. Size: Cellules, 025 x ‘012 mm.— 
In no other Conferva is the number of the filaments so consider- 
lens they are not better discovered, from which it might be Sea 
that one was observing a Thorea. It is but towards the points of the 
branches that, by the assistance of a stron s, they are at last 
distinguished. These whorls are very closely approximated, horizontal, 
horeover, deep towards the point of the branches. As it grows ol 
the plant turns yellow, and is discoloured.—Borg. ; Cooke, l.c. 
: this species, says :—“It grows upon twigs in dee T, has a 
Htish- green colour, and forms tufts as much as ~~ 
the lower porti roceed several thicker branches, ho 
, “most part sterile ; indeed, only the form affine produces, according 
msde, large spore-clusters projecting, however, from the 
R ** 18 not the case here. The femal 
” e 
5 ragum onl ; and oint of fact the trichogonia 
: 8 from the basal cell of a tuft of bra I frequently found 
: - : interverticillate branches are to some degree developed. The.’ 
whet occu including those of the 
wT py the ends of all the branches, including 
con on which fructification is formed. According to the Lira 
and wie latter ought not to be the case. The hairs are very abundan, 
i oreover, 
ant © Projecting ones are as much as 160 p long. Mo : 
Mtticular mention is due to the false branches, which originate in 
