32 
PLEUROTENIUM, Neg. 
P. rectum, f. australis, Racib. Desm., &e., p. 10, Plate I. 
fig. 4. 
Hab.: Herston road, Brisbane, W. J. Byram; rare. 
P. tenue (n. sp.), Schmid. Professor Schmidle says : :—* The entire- 
edged cells are barely 20 » broad and about 460 p long, sie 
attenuated towards the ends and pie sharply froneatene constricted 
at the isthmus, furnished a ing and on oe side a 
perceptibly inflated. The in our specim eHow 
somewhat granulated ; the Se consists of ar longtudival 
bands.” (See Plate II.) 
Hab.: Herston road, W. J. Byram ; rare. 
PLEUROTENIOPSIS, Lund. 
P. turgida, var. ovata, catered Freshwater Alge, New Zealaud 
and Australia, p. 63, Plate VII, fig. 
Hab.: With the foregoing ; rare. 
P. subturgida, orl minor, W. Schmidle. Alge of Sumatra, 
p- 300, Plate VIJ., fig. 4. Professor Schmidle says:- ““Our s ee 
ee ‘perfectly in tase and cell-tiimensions with the forms trom 
Sumatra and Samoa. As appears from the remarks of oe 
and Jenkins’ Riek near Bundamba. Int the materia 
road zygotes of ps variety were abundantly present. 
diameter about 27 » broad, and about 10 long, 0 
curved and furnished with stout spines.” (Plate 
P. bigibbum, W. Schmidle (n. sp.). Professor scknnte apr the 
following description :—“ The cells are about 100 » long, 60 # 
which is formed by a considerable thickening of the ¢ 
The chlorophyll consists of parietal longitudinal bands.” > (Pla 
Hab.: Blackstone, Ipswich, W. J. Byram. 
CLOSTERIUM, aan a 
C. striolatum, Ehrenberg. Frond from 6 to 10 ly depres 
as broad, Junate, attenuated ; ; upper margin ee slightly P 7 
in the centre: lower concave; - ends very obtuse, rounded ; ee 
in a single series; empty frond reddish, especially near <e 
<a 
