PoETEB. — Trichonjnnpha. 



PLATE 2. 



All figures are of Trichonynipha agilis. 



Fig. 7. Diagrammatic longitudinal section througli the anterior portion of 

 Trichonympha, imagined to be not thicker than one band of cilia. 



Fig. 8. Same as Figure 7, but showing an additional layer (st/'} in the nipple-like 

 anterior extremity. 



Fig. 9. Cross section through posterior portion or " body," showing a fold in 

 the body-wall, in which cilia have been engulfed. 



Fig. 10. Section similar to that of Figure 9, except that particles of wood fibre are 

 entangled with the cilia in the engulfed portion. 

 spo. Spores of Fungi eaten by the animal. 



Fig, 11. Diagram of a portion of the surface of the anterior end, the "nipple," 

 and part of the " bell." 



Fig. 12. Diagram of side view of same region as that shown in Figure 11. 



Fig. lo. Complete longitudinal section, showing a gatliering of a clear proto- 

 plasmic substance about the nucleus ; probably an early stage in 

 the development of an immensely thickened nuclear membrane 

 such as is shown in Figure 22. 

 Cross section of posterior portion, showing a fold, as in Figures 9 and 10, 



the walls of which are beginning at a to disintegrate. 

 Complete longitudinal section of an individual more shortened than that 



of Figure 13. 

 Cross section in the region of the line 16-16, Figure 15. 

 Diagrammatic cross section in the same region as Figure 16. 

 Cross section of the nipple-like anterior extremity. 



The second section in a series of longitudinal sections. This is a portion 

 of the bell, the outermost layer having been cut off with the first 

 section from the middle of the figure, but remaining around the 

 margin. In the centre is exposed the striated layer and the roots 

 of tlie cilia arranged in quincunx. 



Fig. 20. Diagram of the condition shown in Figure 19. 



Fig. 21. Cross section in the region of the line 21-21, Figure 15, showing the 

 radiating structure of tlie wall {st. gran.. Fig. 7) separating the 

 anterior from the posterior half of the animal. 



Fig. 22. Longitudinal section showing an immensely thickened nuclear mem- 

 brane. 



Fig. 23. Cross section in the region of the line 23-23, Figure 15. 



