PLATE 2 



EXPLANATION OF FIGURES 



8 U. transfuga. From Wallengren, "Zur Kenntnis des Neubildungs- und 

 Resorptions-processes bei der Theilung der hypotrichen Infusorien," fig. C. 



9 U. transfuga. From Blitschli, plate LXXII, fig. 4a. 



10 U. transfuga. From Butschli, plate LXXII, fig. 4b. 



11 U. setigera. From Calkins, "Marine Protozoa of Woods Hole," fig. 55. 



12 U. transfuga. From Calkins, " Regeneration and Cell Division in L^rony- 

 chia," fig. 1. 



13 U. binucleata. Dorsal view of a stained preparation. 



14 U. setigera. Side view of a stained preparation. 



15 U. setigera. Ventral view of a stained preparation. 



16 U. setigera. Ventral view of an early stage in division. From a stained 

 preparation. 



17 U. setigera. Ventral view of the first stage in division. From a stained 

 preparation. 



392 



