Volvox and Associated Algae from Kimberley. 



507 



chromatophora late patent!, parietali, lobata, pyrenoide singulo in 

 parte basali. 



Fam., 322 x 430 ^, 1290 x 2350 /z, 1400 x 2910 /*, 862 x 4000 /*, etc. 



Cell., 4x5/^-16x13^. 



Cell, e.g. 9 x 9 ^, 12 x 11 /z, 16 x 13 /*, 13 x 14 JJL. 



Found in Pool I associated with Sphaerocystis Poweri, Volvox 

 Rousseletii forma griquaensis and Volvox gigas. 



FIG. 7. Kirchneriella africana, sp. nov. 



A, B, Typical colonies. A, young, rounded colony ; B, older, much lobed, elongated 

 colony of large size ; C, 1-7 cells of various shapes and sizes from a single 

 colony ; D, group of four cells formed by division of a single large cell, the 

 empty wall of which lies adjacent to the group ; cells show the characteristic 

 shape even at this stage ; E, two very young cells, one nearly straight, the 

 other three-lobed ; F, large cell with nucleus already divided and pyrenoid 

 dividing. 



A x70; B x30; C-F x 1500. 



A very large form ; the gelatinous colonies are more or less rounded 

 when young (fig. 7, A), later becoming elongated and irregularly 

 lobed or branched (fig. 7, B), often 1 to 2 mm. in length, while the 

 largest colony as yet observed measured 4 mm. in length by nearly 

 1 mm. in the widest part. 



The cells are very numerous, embedded without definite orientation 

 within the colourless gelatinous matrix, very variable in size and form 

 in one and the same colony (fig. 7, C; Plate XXXV, H), usually tending 



