Ward. — Nectonema. 



PLATE VIII. 



Fig. 96. Transverse section from posterior region of body of male. The dorsal 



margin is somewiiiit brolien. Bismarcli brown. 3. A. X 125. 

 Fig. 97. Longitudinal section of ventral nerve cord near tlie front end of the anal 



ganglion. Bohmer's iisematoxylin. 1. C. X 180. 

 Fig. 98. Dorsal cell viewed as a transparent object in clove oil. The left half of 



the cell is occupied by a large vacuole. 2. D. X 21)0. 

 Fig. 99. Transverse section through dorsal cells and brain. The section is oblique 



enough to pass through the process of the first cell on the left, and of 



the second cell on the right. Mayer's HCl carmine. 2. D. X 290. 

 Fig. 100. Termination of process of right dorsal cell in Fig. 99 found 20 ix fartlier 



posteriad. Mayer's HCl carmine. Apochr. 4 mm. Compens. Oc. 4. 



X 360. 

 Fig. 101. Transverse section of ventral line with ventral nerve cord. Ehrlich's 



haematoxylin and eosin. Apochr. 4 mm. Compens. Oc. 4. X 250. 

 Fig. 102. Transverse section of dorsal line. Ehrlich's haematoxylin and eosin. 



Apochr. 4 mm. Compens. Oc. 4. X 250. 



