11 
It forms large masses on the water, full 
3 of air bubbles, b 
od yellowish ae and of a blackish green ss Peon 
cous, nearly equalling those of Spirogyra nitida, but with much 
pe articulations. When young the colour is of a dull pale green, 
. a ay three imperfectly spiral lines of shining granules are with 
a ty distinguishable. Afterwards these lines become more 
spicuous, the rest aot te filaments beg: now perfectly pratt: 
till 
oe 176. Cooke le. fas ie 
Hab.: At Herston road, Brisbane, W. J. Byram. 
* un 
eae moO AL. p- as occurring at Burpengary. grt sor 
3 idle also notes it as Pieeee in the collectiun made by Mr. W.- 
yram, at Jenkins’ Quarry, Bundamba. 
unata, Sch : | 
oy “inex ik idle. Beitr. Alg. Schwarzw., p- 15, Plate II, fig 
b.: Waters of the Gulf country, Dr. Thos. L. Bancroft. 
QD bans O 
D. maa: pesmipium, 4g. /#7¢ a 
of ‘at atum, Nordst. Length of eal 19°5-19°5-23 p 5 oun — 
27-26-26 »; breadth at isthmus, 22- 21-21 p. 
oe —— Rockingham Bay, J- Dallacke ; 
J ‘paawine River, Dr. 
broader apices to the cells. 
Oarctatum, Nordst. Form with 
30»; 
Le: at 
meth of cell, 28- the isthmus, 
breadth at the ne 29 B35 — 38 px; breadth at the is 
Hab.: Johnstone River, Dr. Thos. L. Bancroft. 
D. aptogonium, Bréd. 
ab.: Waters of the Gulf country, 
Dd, 
Pwonium, 8 acutius, Nordst. 
q : Between Norman and Gilbert Rivers, T. Gulliver. / 
j a. Swartz rtzii, 4g. 
Hab.: Johnstone Rivet, Dr. Thos. L. Bancroft. } 
Dr. Thos. L. Baneroft. pr fr- 
D. beng galicum, Zurn. Alge of East India, p- 147, Plate XIX, 
: bead Larger form. Length of cell, 26-27 breadth, 34-35 
; th of isthmus, 26 »; breadth at ape, 99-24°5 p. (Plate XI iL) 
: -: Rockingham Bay, J. Dallachy. 
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