Munson. — Spermatogenesis of Papilio. 
PLATE 12. 
Fig. 1 . Papilio rutulus, reduced T. 
Fig. 2. Larva of Papilio rutulus , reduced 
Fig. 3. Pupa of Papilio rutulus, reduced 
Fig. 4. Grandmother stem cell with branch cells and cortical nuclei. 
Fig. 5. Longitudinal section of adult testis. 
Fig. 6. Transverse section of pupa of Papilio rutulus. 
Fig. 7. Dissected abdomen of adult Papilio showing testis and vas deferens. 
Fig. 8a. Transverse section of adult testis, showing right and left testis and 
the four follicles of each. 
Fig. 8b. Transverse testis of Grapta silenus. 
Fig. 9-23. Stages of developing spermatocysts from teased testis. 
