i1 
‘Diameter of the ripe oogonia 60-62 The size of the oo ogonia here 
Hwice a: as large in the syle fone 28-45 w thick, and 1-3 times as 
long; whereas in “renee which I have found at Heidelberg they 
are also bores 10-20 ». broad 
__ Thisalga has fae been assigned by me to Australia, but ood in 
the ital peewee (see Botany Bulletin No. VI., page 9).—Moeb 
_ _Hab.: Glasshouse Mountains, September, 1892, Dr. Thos. L. Bancroft. 
_ An interesting ee of this alga, suitable for students, will be found in 
Bower's Practical Botany, 8rd edition, p. 419. Reference may also to 
Wolle’s Freshwater een of the United States, p. 64, and to Plate LXXII., Fig. 
8-13, grag to that work. The alga is also figured i in Plate IIT. of Botany 
Bulle tin No. VI.; the latter figures being copied from Cooke's British Freshwater 
Alges, p. 196. 
C. irregularis, Pringsh. Thallus bright - green, acnaate 
irregularly disposed——not parenchymatous and not with any system of 
meets articulations longer or more frequently shorter than the 
diameter. Oogonia transversely broadly oval, usually at the ends of 
, nude. Filaments 15-20 p wide. Oogonia diameter ~ 
#.—Wolle, Freshwater Alge of U. S. America, 65. 
£. Moebius gives the following note :—‘“Upon the cells of 
e 
e specimens obearved it urope an 
Hab.: Burpengary, March, 1893, Dr. Thos. L. eae 
BULBOCHETE, Ag. 
». setigera (Roth), Ag. Oogonia depressedly somewhat quad- 
‘2 ngularly ce caked beneath terminal sete or beneath andro- 
eee: membrane of the oogonium fter fertilisation thickened : 
014- ‘018 m m.; oogonia, ‘075-08 i) 
: tomas, 012. 013 x °034-"036 mm. —Cooke’s British rep fre 
Y dotted. The oogonia never form the end of a longer branch, 
aly of a short nt ie branch ; they have a compressed spherical 
