Figs. 9 and 10. Left jaw of Peripatus capensis (male), shewing reserve jaws. (From a drawing by Miss Balfour.)
Fig. 9. Inner jaw.
Fig. 10. Outer jaw.
Plate 49.
Figs. 11-16. A series of six transverse sections through the head of Peripatus capensis.
Fig. 11. The section is taken immediately behind the junction of the supra-œsophageal ganglia, c.g., and passes through the buccal cavity, M., and jaws, o.j. and i.j.
Fig. 12. The section is taken through the hinder part of the buccal cavity at the level of the opening of the mouth into the pharynx and behind the jaws. The cuticular rod-like continuation (le.) of the inner jaw lying in a backwardly directed pit of the buccal cavity is shewn; on the right hand side the section passes through the opening of this pit.
Fig. 13. The section passes through the front part of the pharynx, and shews the opening into the latter of the median backward diverticulum of the mouth (M1), which receives the salivary ducts. It also shews the commencement of the ventral nerve-cords, and the backwardly projecting lobes of the brain.
Fig. 14. The section passes through the anterior part of the pharynx at the level of the second commissure (co.2), between the ventral nerve-trunks, and shews the mass of cells developed on this commissure, which is in contact with the epithelium of the backward continuation of the buccal cavity (M1).
Fig. 15. Section through the point of junction of the salivary ducts with the median oral diverticulum.