EXPLANATION OF PLATE 11 

 Figs. 25-il. Eexamitus intestinaUs from Diemyctylus torosus. X 2583 



Fig. 25. Trophozoite with oval form; note characteristic nuclei without 

 nuclear membrane and with large blepharoplast complex. 



Fig. 26. Trophozoite with rounded extremities; axostyles crossed. 



Fig. 27. Trophozoite with metabolic posterior extremity. Blepliaroplast and 

 nuclei fused. 



Fig. 28. Early prophase of division; separation of blepharoplasts with their 

 attendant motor organelles. 



Fig. 29. Prophase of division; unusual appearance of chromatin. 



Fig. 30. Prophase; spireme with spindle fibers appearing. 



Fig. 31. Prophase with spindle formation. 



Fig. 32. Prophase with equatorial plate. 



Fig. 33. Metaphase of division. 



Fig. 34. Anaphase of division. 



Fig. 3.5. Telophase of division with beginning of reorganization of nuclei. 



Fig. 36. Beginning of final separation of daughter individuals. 



Fig. 37. Somatella, the product of multiple fission with seven pairs of nuclei. 



Fig. 38. Somatella with six pairs of nuclei. 



Fig. 39. Somatella with three pairs of nuclei. 



Fig. 40. Neuromotor apparatus after degeneration of cytoplasm, showing 

 connection of nuclei and axostyles with blepharoplasts. 



Fig. 41. The same, showing the presence of two large vacuoles between the 

 nuclei. 



