Plate 97 



Fig. 1. Mallomonas caudata Iwanoff, x 590 



Fig. 2. Mallomonas fastigata var. macrolepis ( Conrad ) Con- 



rad, X 750 



Fig. 3. Mallomonas apochromatica Conrad, x 590 



Fig. 4. Mallomonas producta (Zacharias) Iwanoff, x 500 (re- 



drawn from Smith ) 



Fig. 5. Mallomonas producta var. Marchica Lemmermann, x 



500 ( redrawn from Smith ) 



Fig. 6. Mallomonas tonsurata Teihng, x 500 ( redrawn from 



Smith) 



Fig. 7. Mallomonas urnaformis Prescott, x 1000 



Fig. 8. Chnjsostrella paradoxa Chodat, x 800 



Fig. 9. Lagynion ampullaceum ( Stokes ) Pascher, x 600 



Fig. 10. Lagynion macrotrachelum ( Stokes ) Pascher, x 1000 



Fig. 11. Lagynion triangularis var. pyramidatum Prescott, x 



1000 



Figs. 12, 13. Lagynion reductum Prescott: 12, x 590; 13, x 1000 



Fig. 14. Lagynion Scherffelii Pascher, x 600 



[854 



