Williams.— Anatomy of Boophilus. 
PLATE 20. 
Fig. 11. Cross section of a diverticulum of the alimentary canal. Haema- 
toxylin ; oc. 4, obj. 8 mm., tube 145 mm. X 120. 
Fig. 12. Cross sections of a diverticulum of the alimentary canal, a trachea, 
and a Malpighian diverticulum from a male specimen; oc. 4, obj. 
4 mm., tube 145 mm. X 225. 
Fig. 13. Section through a porose area of a female capitulum from a frontal 
section ; oc. 4, obj. 4 mm., tube 145 mm. X 225. 
Fig. 14. View of a small portion of a salivary gland from above ; oc. 4, obj. 
8 mm., tube 145 mm. X 120. 
Fig. 15. Dorsal view of the whole excretory system of a male ; oc. 4, obj. 
16 mm., tube 145 mm. X 55. 
