Plate 129 



Fig. 1. Hapalosiphon intricatus West & West, x 750 



Figs. 2-4. Hapalosiphon pumilus (Kuetz. ) Kirchner: 2, x 750; 3 

 and 4, X 1050 



Fig. 5. Stigonema turfaceum ( Berkeley ) Cooke, x about 390 



( redrawn from Engler & Prantl, ex Tilden ) 



Fig. 6. Calothrix atricha Fremy, x 900 



[918] 



