Dicranochaete reniformis Hie)on. 
1 i6 
off from the bristles of Glceochcete, 1 a genus of the Cyanophycae 
which has been placed by some authors in the Chlorophyceae, but 
which is certainly not allied to Dicranoclicete , Blackman and 
Tansley* place Dicranoclicete in the family Chlorococcaceae of the 
Protococcoideae, the characteristic feature of this family—in which 
they include, besides Dicranoclicete, the genera CJilorccoccum, 
Sykidion, Characium and Halosphcera —being the method of 
reproduction which is effected solely by zoogonidia, vegetative 
division occurring only in the palmelloid stages. With other 
setigerous green algae Dicranoclicete seems to show little or no 
direct affinity owing to the absence of vegetative division in the 
latter, there being no evidence that this character is other than 
primitive. The absence of setae in such a genus as Characium does 
not preclude the possibility of an affinity between it and Dicranoclicete 
as these structures in algae have certainly been evolved along several 
widely separated lines of evolution. 
In conclusion I wish to express my indebtedness to Mr. W. B. 
Grove for helping with the literature. 
1 See G. S. West’s “ British Freshwater Algae,” 1904, p. 345. 
1 “ Classification of the Green Algae,” New Phytologist, Vol. I, 1902, 
p. 92. 
