29 
_ wssuming a red colour, germinates after a long period of rest, and 
brings forth a new Pandorina. There is hardly any appreciable 
difference, except in size, between the male and female zoospores. 
_ Most frequently a small zoospore pairs with a large one; but two o 
equal size oftén unite. Probably both the females and males vary 
much in size—the former more so than the latter 
g 
aot there is little doubt that those of the larger size are females ; 
0 
parthenogonidia. The rgest colo ich I observed has a 
cea or 230 «; complete cells (perhaps 32) have developed into 
- “aughter colonies, 
: The single cells are about 7 p thick 
Perhaps generally distributed ; mentioned from Europe, North 
America, Argentine, Afghanistan, New Zealand, Siberia: 
Hab. : Dalby, Darling Downs; collection, May, 1893, Dr. Thos. L. Bancroft. 
(Plate VIIL., Fig. 8.) 
Pp PHACUS. e 
‘ ioe euronectes, Nitsch. Prof. Moebius gives the following 
—me—"Diameter, 20-40 »; therefore in a smaller form.” 
Probably generally distributed. 
% b.: Victoria Park, Brisbane Swamps, 3rd November, 1892; collected at 
amg November, 1892 Dalby, Dasling Downs, May, 1893, Dr., Thos. L. 
(Plate VIL, Fig. 12.) 
PS SCENEDESMUS, Meyen. 
: te SUgatus (Turp.), Kuetz. (=S. obtusus, Meyen). Cells 
timple or obvate, obtuse at the poles, 4-6-8 loosely connected in t 
wnes or joined obliquely, 3-5 times as long as broad. Size: 
» 0055-007 mm. diameter.—Cooke’s British Freshwater Alge, 33. 
a Oh Moebius says much resembles 
Ge $ says:—‘ The form observed very mu 
Which is figured by Wolle in Freshwater Alge of the U.S.A. 
aslons are given. : 
Pethaps generally distributed ; not yet mentioned for Australia. 
