PLATE LI. 



Fios. 



1-7. Lecythium hyalinum Hertwig & Lesser, (p. 105) 

 Active solitary individuals; the protrusion of plasma 

 as shown in Fig. 7 is due to want of air. After 

 Cash. X 500. 

 8, 9. L. mutabile (Bailey) Hopk. (p. 108) Side and 

 vertical views of an active individual. After Cash. 

 X 500. 

 10,11. Pfieudodifflngia gracilis Schlnmherger. (p. 114) Side 

 and vertical views of active individuals. After Cash. 

 X 500. 

 12. P. fulva Archer, (p. 117) After Cash, x 500. 



