OF SOUTH AUSTRALIA. 
401 
APPENDICES. 
I* — Class CHLOROPHYCEAE (“Green Algae"). 
The great majority of the Chlorophyceae (some 90 per cent) are fresh- 
water inhabitants, the remainder being marine, but all are included in the 
one classification. Phycologists are in general agreement concerning the 
natural affinities of many groups of genera, but there is great diversity of 
opinion concerning the limits of groups larger than the family. In Part 
I. of “The Seaweeds of South Australia” Lucas gave a description of the 
marine Chlorophyceae of this State, but the classification he used is now 
outmoded. In this appendix the common Chlorophyceae found in 
South Australia are listed, together with the localities from which they 
have been collected. The system of classification followed is that given 
by G. M. Smith in his “Cryptogamic Botany”, Vol. I. (1938), as being 
representative of modern ideas on the systematics of the Chlorophyceae. 
For descriptions of the genera and species, Part I. of “The Seaweeds of 
South Australia” must be consulted. 
Eleven orders may be recognized. 
I. VOLVOCALES. 
The only Chlorophyceae in which the vegetative cells are flagellated and 
actively motile. All are fresh-water forms. 
II. TETRASPORALES. 
Vegetative cells immobile, usually united in non-filament ous colonies that 
are either amorphous or of a definite shape. All are fresh-water forms. 
III. LTLOTRICHALES. 
Cells uninucleate, with a single parietal laminate chloroplast, united 
end to end in simple or branched filaments. Asexual reproduction by 
zoospores; sexual by union of isogamous, anisogamous, or oogamous 
gametes. A few marine species, but the majority are fresh-water forms, 
comprising several families. 
Family Chaetophoraceae. — Thallus branching, filamentous, branches 
free or pressed together into a pseudo-parenchymatous tissue. Terminal 
cell may be prolonged into a long colourless seta. Cells uninucleate, with 
a single parietal chloroplast. 
Entocladia Reinke, 1879 (= Endoderma Lagerheim, 1883). 
Ent. viridis Reinke (= End. viride Lagerheim). Eastern Bays. 
IV. UL VALES. 
Cells uninucleate, dividing in two or in three planes to produce a paren- 
chymatous thallus that may be an expanded sheet, a hollow tube, or a solid 
cylinder. Asexual reproduction by means of quadriflagellate zoospores; 
sexual by biflagellate gametes, either isogamous or anisogamous. This 
order includes only one family, the Ulvaceae, which is included by some 
authorities in the Ulotrichales because of similarities in cell structure and 
reproduction. 
Rational herbarium of Victoria 
