500 



NKW AND RARE FRKSHWATP^R ALGiE, 



Var. OBLOXGUM Playf. (Text-fig. 25, c). 

 Biol. Richm. River, p. 135. Generally sparsely distributed in 

 isolated sets of 4, or more rarely of 16. The latter were frequent 

 in plankton from the Nymboidia River, near Grafton, where I 



0181 18 1® 



01 m iiii 



00 80 0i8i 

 GO 



nng 



Text-fig. 2. 

 (a) Merismopedium punctatum Meyen, forma, ( x500); (h, c) var. oblongum 

 •Playf., [h X 1000, c x6fi0); (cZ, e) var. vacuolatum, n.var., ( x660); 

 (/) M. cyaneitm, n.sp., ( x 660); ig) M. elegans var. constrictum, n.var., 

 ( x 660); (A) M. duplex, n.sp., ( x 1330). 



even noted a large coenobium (30 x 20/x) of four sets of 16 cells 

 each. The cells are irregularly oblong, the contents pale blue. 



Cell. long. 2-3, lat. l-|-2/x (plerumque 3 x 2/x). 



Lismore(350); Grafton (265, 266). 



Var. VACUOLATUM, n.var. (Text-fig. 2c/, e). 

 Cellulae globoste vel oblongie; media cellula loco vacuo magno 

 occupata. 



Cell, diam. 2/x; vel long. 3, lat. 



Lismore (350). 



The cells are irregularly globose or oblong, and the centre is 

 occupied by a large vacuole giving each cell the appearance of a 

 ring 

 coenobium 



Globose and oblong cells are sometimes mixed in the same 



