Co te ae eee ee RU, Bot 
21 
the abundant formation of rhizoids, even by the upper branches. 
The branchlets of rhizoids are known by their thinner irregularly 
in Ohetophora ; ‘at any ra nd nowhere noticed, not eve 
by Berthold, who yet in other respects expresses himself. fully with 
gard to the branching of Cheto I have, therefore, also 
regard e 
on a examined other species of Chetophora, and found the 
Ch, tuberculosa is known to occur in Europe, North America, and 
New Zealand. 
Hab.: Burpengary ; collection, November, 1892; Dalby, Darling Downs, 
Dr. Thos. L. Bancroft ; collection, May, 1893. 
(Plate V., Figs. 1-2.) ae 
.punctiformis, Kuetz. In Cooke’s British Freshwater Alge, 
and in Wolle’s Freshwater Alge of the U.S. of Amer., this plant 
is placed in the genus Rivularia. Both notices are here given :— 
..  Rivularia echinata, English Botany, in Cooke's B.W. Alge, 
278. Syn.: Chetophora punctiformis, Kuetz.; Conferva echinata, Eng. 
Bot. ; y. @ inute, dark- 
af 
coloured, compact. Threads fastigiate, attenuated upwards to the 
2a closely cohering, articulated, heterocysts basal, globose. Sheath 
Size: 
8 
*ry harrow, almost inconspicuous. Trichomes ‘007 mm. at 
base, 25 mm, long.” — Cooke l.c. 
“ Rivularia echinulata, Sm. Wolle’s Freshwater Alge of US 
; of Amer. Syn.: Chetophora punctiformis, Kg. ; Echinella articulata, 
la. ; Conferva echinata, Eng. Bot. ; Conferva momen se 
: i or bro n. l . 
tigiate, attenuated upwards to the apex, closely cohering, articulate ; 
D; ‘tocysts basal, globos sheaths very narrow, inconspicuous. 
i 
e; 
ameter of trichomes at base, about 7 2; 250 p, more or less, long. 
Wolle L.e. : 
