Plate 54 



Fig. 1. Oocystis hcustris Chodat, x 1750 



Fig. 2. Oocystis nutans var. major G. M. Smith, x 1000 



Fig. 3. Oocystis parva West & West, x 750 



Figs. 4, 5. Oocystis piisilla Hansgirg: 4, colony, x 800; 5, single 

 cell, X 1350 



Figs. 6, 7. Oocystis nodulosa West & West: 6, x 250; 7, x 400 

 ( adapted from West, ex Brunnthaler ) 



Figs. 8, 9. Oocystis pyriformis Prescott, x 590 



Fig. 10. Oocystis solitaria Wittrock, x 1000 



Fig. 11. Oocystis panduriformis var. minor G. M. Smith, x 1000 



Fig. 12. Ooci/stis submarina Lagerheim, x 1000 (redrawn from 



Smith ) 



Figs. 13, 14. Gloeotaenium Loitelshergerianum Hansgirg, x 440 



Figs. 15, 16. Nephrocytium Agardhianum Naegeli, x 500 



Fig. 17. 'Nephrocytium ecdysiscepanum W. West, x 500 



Fig. 18. Nephrocytium limneticum (G. M. Smith) G. M. Smith, 



x500 



Fig. 19. Nephrocytium lunatum W. West, x 750 



Fig. 20. Nephrocytium obesum West & West, x 590 



768 ] 



