57 
C. eruginosa, Henf. Cooke’s British Freshwater Alger, 212. 
- Frond floating in vast strata on freshwater pools, forming a bright- 
en scum, presenting to the naked eye a finely granular appearance ; 
when dried, appearing like a crust of verdigris; cells minute. Size :’ 
ds, ‘03-18 mm.; cells, ‘(0025-0035 mm.—Cooke, L.c. 
D 
until the whole becomes a.coarsely-latticed sac or clumsy net o 
Bee lobed form. Then this becomes broken up into irregular 
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Prof. Moebius says:—‘‘ The material consisted only of peridinia 
and of this alga. Its globular cells are 3-4 p thick; the families of 
very many forms at first globular, then sausage-shaped or = 
_ Fig. 54: a, thalli magnified 200 diam.; 8, cells magnified 400 
diam —Cooke, luc. a 
Hab.: Enoggera Creek, brought b j hedam, Thor. L. Bancroft 
: , y the pipes from the dam, 
Also found in Europe and North Aiton: 
sopogon, whic 
Was collected by Mr. Bailey in Queensland. In the dry condition its 
een a clear violet, but in the branching, the dimen- 
1888, part 9-10.’ The rind on the younger branches 
Sats ne layer; on the older from two to three layers. ci 
ot Tost cells of the rind are here and there papille-form; they do 
me in such regular rows as Kiitzing indicates. In the oldest 
