170 JESSIE A. SALLITT. 



3. — Corpuscles dividing into three. 



4. — Corpuscles dividing into four. 



5. — Recently freed corpuscles. 

 Pigs. G to 13.— Chlorophyll corpuscles of Steutor polymorphus. 



6. — Group of corpuscles. 



7._Corpuscles dividing, a. h. c. Different views of the same cor- 

 puscles, showing the chloroplasm to be a superficial layer enclosing a 

 ball of transparent protoplasm. 



8. — Corpuscles dividing into three, a. Shows the chlorophyll pole.. 

 b. The protoplasmic pole. c. Lateral view. d. Advanced stage in 

 division. 



9. — Corpuscles dividing into four. a. Division of chloroplasm. b. 

 Chlorophyll and protoplasmic poles of a corpuscle, c. Lateral view. 

 cZ. Views of a rotating corpuscle, e. Advanced stage in division. 



] 0. — Irregularly dividing corpuscle. 



11. — Recently freed corpuscles. 



12.— Corpuscles bleached by alcohol, granular and spongy-looking. 



13. — Bleached corpuscles stained by iodine. 



Pig. 14. — Corpuscles of Vaginicola grandis. 



Fig. 15. — Phacus lougicaudis, showing separate corpuscles (F. 1)^ 



Fig. 16. — Corpuscles of Phacus longicaudis. 



Fig. 17. — Phacus glabra (F. 4), chlorophyll corpuscles obscured by 

 amylaceous bodies, a, a. 



Fig. 18. — Corpuscles of Phacus glabra. 



Fig. 19. — Portion of Euglena acus, showing chlorophyll corpuscles 

 (F. 4). 



Fig. 20. — Corpuscles of Euglena acus. 



Fig. 21. — Corpuscles of Euglena oxyuris. 



Fig. 22. — a, b, c. Euglena viridis, showing separate corpuscles. 

 a. Motile forms (F. 1). b, c. Encysted forms (D. 4). 



Figs. 23, 24. — Corpuscles of Euglena viridis. 



Figs. 25, 2G. — a, b, c. Different views of the same corpuscles. 



Fig. 27.— Euglena, showing corpuscles and colourless protoplasm passing 

 out from the apparently green endoplasm (F. 4). 



Fig. 28.— Young Euglenae (F. 4). 



' Zeiss's powers. 



