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EXPLANATION OP THE PLATES. 



All the fig'uves are camera lucida drawings, and were made with the aid of 

 Zeiss 2 nn«. apochwmatic objective and compensating oculars 18 and 12, giving 

 approximate magnifications of 2786 and 1833 diameters respectively. 



Plate I, 



All figures magnified 2786 diameters approximately. 



Fraw^zekia {JSofit;^) saltans. 

 Fig. 1. Organism seen from th,e ventral aspect. 



2. Side view. 



3. Dorsal view, a small b,lepharoplast at the base of each flagellum. 



4. Doubling of th(? autevior ftageUun;. 



