Plate 5 



Figs. 1, 2. Tetraspora cylindrica (Wahl.) C, A. Agardh: 1, habit x 1; 

 2, cell arrangement, x 220 



Figs. 3, 4. Tetraspora gelatinosa (Vauch. ) Desvaux: 3, habit of 

 young colony, x 5; 4, habit of older colony, x 1 



Fig. 5. Uronema elongatum Hodgetts, x 440 



Fig. 6. Tetraspora lamellosa Prescott, x 500 



Figs. 7, 8. Apiocystis Brauniana Naegeli: 7, colony, x 440; 8, single 

 cell, X 1500 



Fig. 9. Tetraspora luhrica (Roth) C. A. Agardh: portion of old 



thallus, X 1 



Fig. 10. Apiocystis Brauniana Naegeli, x 300 



Fig. 11. Tetraspora lacustris Lemmermann, x 440 



[670] 



