Warp. — Nectonema. 
PLATE VI. 
Figs. 72-88. Successive transverse sections through the brain. The small ner- 
vous nuclei are represented by simple dots, the nuclei of the large 
cells as accurately as possible; the cell bodies are not represented. 
Fig. 72 is the twelfth section from the apex of the head ; each section is represented 
from its anterior face, and approximates 10 w in thickness. Ehrlich’s 
hematoxylin. 2.A. X 965. 
Fig. 89. The posterior end of the male with anal ganglion and dorsal sac viewed 
as a transparent object in clove oil. Only a few of the numerous Gre- 
garinida (*) in the body cavity are represented. 2. A. X 66. 
