103 
Dec. 81. 1909. The Queensland Natukalist. 
that of Moebius, from Burpengary specimens, are as fol- 
lows : Diam. of sterile cells, 32-38 ^ ; four to fifteen times as 
long: spirals varying from nearly straight to four revo- 
lutions : spore diameter to 43 y. 
Sfirogyra duhia (Fig. 11). 
As this species has not hitherto appeared on the list 
of Queensland algae. 1 give its full description from the 
living plant, which agrees so closely with the diagnosis, 
though slightly exceeding it in some paiticulars, as to leave 
no doubt of its identity. 
Sfirogyra nitida (Fig. 12). 
For an account of this species see Bailey’s Botany 
Bulletin. Xo. XT. Fig. 12 is after the figures of Wolle 
and Petit, as the plant has not been seen by me. 
Spirogyra bellis (Fig. 13). 
Moebius having arrived at a determination of this 
species from an observation of the sterile threads, I have 
figured one in Fig. 13, as observed by me, together with 
Petit’s figure of the fertile thread. The gelatinous 
sheath mentioned by Moebius did not appear in my 
specimens ; it is probably not persistent. See Botany 
Bulletin. No. 11. 
Spirogyra maxima (Fig. 14). 
Prof. Moebius describes a variety “ Minor ” of this 
species, but the s])ecies itself does not seem to have been 
identified in the algae of the colony. Though varying 
greatly in the diameter of the cells, it is one of the easiest 
species to recognise. Fig. 14 is copied from a photo- 
micrograph of the fresh specimens 
Spirogyra c.rassa. (Fig. 15). 
This, the last species in the list, T have not found, 
and it has been admitted to a place among Queensland 
Spirogyra bv Moebius from an examination of sterile 
threads only. Fig. 15 is taken from Petit’s excellent work 
already referred to. 
I desire, in conclusion, to acknowledge my indebtedness 
to Miss J. Affleck, of Westhall, Freestone Creek, for her 
kindness in colouring the figures. 
