308 LEONARD P. SAYLES. 



PLATE I. 



Uninjured Individuals. 



FIG. i. Mouth cavity and hypodermis, showing small nuclei and nucleoli in 

 this region. 



FIG. 2. Growing region at posterior end. 



FIG. 3. Setigerous gland of an old segment. 



Fie. 4. Gut of fourth segment. 



FIG. 5. Gut of thirteenth segment. 



