176 
FIG. 
FIG. 
FIG. 
FIG. 
Fic. 
ke? 
5: 
BRODE. 
EXPLANATION OF PLATE XIII. 
Dero vaga, worm in case. 
Branchial apparatus at posterior end of body. 
Lateral view, showing central nervous system and lateral nerves. 
Lateral view of sympathetic system — outer coat of pharynx removed. 
Cross section of worm through pharynx. Gold chloride preparation, 
showing sympathetic and lateral nerves. 
Fic. 6. Dorsal view of nervous system in anterior segments. 
FIG. 7. 
Dorsal view of nervous system at growing zone. 
Fic. 8. Dorsal view of frontal section of nerve cord in one segment. Gold 
chloride preparation. 
Fic. 9. Lateral view of anterior portion of a worm, showing sense organs. 
