PoRTEB. — Trichonympha. 



PLATE 3. 



Figs. 24-26. Trichonymphae showing conditions which may be preparatory to 



longitudinal division. Compare text. X 520. 

 Fig. 27. A parasite supposed by Leidy to be a young stage of Trichonympha. 



X 520. 

 Fig. 28. Another similar individual with a peculiar swollen cap. X 520. 

 Fig. 29. An individual more highly magnified. X 1100. 

 Figs. 30-32. Young heretofore considered as immature Trychonymphae, but which 



I believe to be a distinct species. X 520. 

 Fig. 33. Longitudinal section of a Pyrsonympha. X 400. 

 Fig. 34. A Pyrsonympha containing wood fibre, the fiagellura protruding in a 



tail-like appendage from the posterior or unattached end. X 400. 

 Figs. 85, 36. The same kind of parasite as is shown in Figures 30-32. 

 Fig. 37. The same kind of parasite as those shown in Figures 30-32, 35, 36, but 



drawn from a living specimen. X 520. 

 Fig. 38. The same as Figure 37, but just after death in normal salt solution. 



X 520. 

 Fig. 39. The same kind of parasite as that shown in Figure 37. X 520. 

 Fig. 40. A Pyrsonympha apparently in the act of engulfing a particle of wood 



fibre. X 400. 

 Fig. 41. A Pyrsonympha with a peculiar flagellum. X 520. 

 Figs. 42-44. The same kind of parasite as that shown in Figure 39. X 520. 



I 



