PLATE XXXVa. 
The Lettering is the same in all the Figures, 
h. Cuticle. 
c. Hypoderm. 
d. Circular muscular coat. 
e. Dorsal longitudinal muscles. 
f. Ventral longitudinal muscles. 
g. Oblique muscles. 
j. Alimentary canal. 
k. Tufts of spines and bristles. 
l. Glandular organs. 
n. Nerve cords. 
Fig. 1. Transverse section of the body^wall of Nothria willemoesii in the 
anterior third, ....... 
Fig. 2, Transverse section of the same region of the body in Nothria ehlersi, . 
Fig. 3. Nerve-area (in section of the anterior third) of Glycera kerguelensis, . 
Fig. 4, Papillae of the proboscis of the same species, . , . . 
Fig. 5. Nerve-area of Glycera lamelliformis, . . . . 
Fig. 6. Nerve-area (ganglionic region) of the anterior third of Glycera magel- 
lanica. ........ 
X 12. 
X 30. 
X 74. 
X 90. 
X 55. 
X 90. 
Fig. 7. Section of the interganglionic region in the same species. 
X 90. 
