102 The Queensland Naturalist. Vol. I. 
recorded, with cells up to ten times their diameter in length, 
while the diameter of zygospores has varied from 24-44 
Moebius gives 34 Fig. 6 is copied from a drawing from 
fresh average specimens. 
Spirogi/ra quinina (Fig. 7). 
Many of the species of Spirogyra have quite a number 
of synonyms, but in most cases modern algologists are 
agreed upon the final choice of the specific name. In the 
present instance such is not the case, opinions being pretty 
evenly divided as to whether this species should be called 
S. quinina or 8. porticalis. Though by far the commonest 
in this locality (Freestone, Warwick), I find no record of 
its having been found in the colony. It grows here in 
prodigious quantity, taking complete possession of the creek 
at times for miles, and is an abundant fruiter, and more 
variable than any species I have observed. 
Fig. 7, representing it, is reproduced from a photo, 
showing the commonest forms. The spiral may be either 
slender, lax, and pale yellowish, or broad, dense, and deep 
green. The fruiting cells are sometimes swollen, sometimes 
cylindrical, and either longer or shorter than the spore, 
as shown in the figure. The spores also vary from elliptic 
to globular, green when young, afterwards changing to a 
beautiful chestnut brown. 
Spirogyra punctata (Fig. 8). 
In Mr. Bailey’s Botany Bulletin, No. VI., Prof. 
Moebius describes a Queensland variety “ tenuior ” of this 
species. Both the species and the variety are unknown 
to me. For the sake of completeness I have figured the 
species in its place after the illustrations of Petit and Wolle. 
Spirogyra australensis (Fig. 9). 
A description of this species may be found in Mr. 
Bailey’s Botany Bulletin, No. XI., and the figure is copied 
from that of Prof. Moebius. Like the last, it has not come 
under my observation. They are both distinguished by 
spores, the membrane of which is covered by fine protu- 
berances. 
Spirogyra rivularis (Fig. 10). 
In the specimens examined by Prof. Moebius, the 
dimensions were slightly less than those of the typical 
species. Specimens from this neighbourhood, however, 
show a maximum diameter of cells exactly corresponding 
with the type, a minimum somewhat smaller, and a 
maximum length of cells exceeding that of the type. The 
species is very abundant in the sterile state, but seems to 
be a rare fruiter. I have only once found it in fruit, though 
I have collected and observed it scores of times. The 
chief points of difference in my description compared with 
