ON DIPLOZOON NIPPONICÜM, N. SP. 191 



Fig. 5. — Section of the same in the direction indicated by xy in 



Fig. 3. 

 Fig. 6. — Hooks between the posterior suckers. 



PI. XXII. 



Fig. 7. — A part of a cross-section of the worm passing through one 

 of the conical elevations of the epidermis. It also passes 

 throug-h one of the transverse folds into which the surface of the 

 body is thrown when the animal contracts ; hence the longitudinal 

 muscles are separated from the circular by a rather thick layer 

 of connective tissue. 



Fig. 8. — Section of the sticky gland, from a cross-section of the 

 worm. 



Fig. 9. — Section of the anterior sucker, from a cross-section of the 

 worm. 



Fig. 10. — To shew the direction of the diagonal muscular fibres, 

 from a horizontal section of the worm. 



Fig. 11. — Cross-section of the pharynx. 



Fig. 12. — Diagram shewing the muscles accessory to the pharynx. 



Fig. 13. — A part of a cross-section of the worm, from the posterior 

 half of the body, a little posterior to the testis ; to shew the 

 character of the mesenchyma. 



Fig. 14. — The portion of the mesenchyma situated between the ovary 

 and the testis, from a sagittal section of the worm. 



Fig. 15. — Excretory funnel, Seibert apochr. sys. 4 mm. x8. 



Fig. 16. — Cross-section of the ventral nerve. 



Fig. 17. — The brain, from a cross-section of the worm. 



Fig. 18. — The testis, from a longitudinal section of the worm. 



