i I ANATION OF PLATE 49. Iv 



into tin- 01. il papilla, accessory pi n the last pair of legs (enlarged crural 



glands), :in.| i-Lr men t a i organs, \ i dor ,al Mirf.i.r. The finrt three pairs of 



aental orgai nly of the vesii l i leading t<> the exterior. The 



fourth ami lifth pairs .u<- larger than the >ucceedini;. and open externally to the crural 

 gland.-,. Tin- ventral nerve-cords unite behind <lors.il to the rectum. 



A. Anus. a. g. Accessory gen i; I, or enlarged crural gland of the ijth 



KL;. <//. Antenna, e.g. Supra-ccsophagcal ganglia with eyes. co. Commissures 

 between the ventral nerve-cords, d. n. Large median nerve to dorsal integument 

 hinder part of brain. P. i,a,9 <-e. . (Esophagus. 



ass. co. CEsophageal commissures, or. p. Oral papilla, p.d.c. Posterior dorsal com- 

 missure between the ventral nerve-cords. //;. Pharynx, p. n. Nerves to feet, one 

 pair from each ganglionic enlargement. si. d. Reservoir of slime gland. si. g. 

 Tubules of slime gland. s. o. i, 2, 3, 6f. Segmental organs, v. c. Ventral n 

 cords, v.g. Imperfect ganglia of ventral o 



Figs. 9 and 10. Left jaw of Peripatus capcnsis (male), shewing reserve jaws. 

 (From a drawing by Miss Balfour.) 



Fig. 9. Inner jaw. 

 Fig. 10. Outer jaw. 



PLATE 49. 



Figs, n 16. A series of six transverse sections through the head of Peripattu 



capensis. 



Fig. n. The section is taken immediately behind the junction of the supra- 

 resophageal ganglia, e.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 cuti- 

 cular rod-like continuation (te.) of the inner jaw lying in a backwardly directed pit of 

 the buccal cavity is shewn; on the riijht 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 diverticalum of the mouth (M 1 ), 

 which receives the salivary ducts. It al>o 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. a), between the ventral nerve-trunks, and shews the 

 mass of cells developed on this commi^ure, which is in contact with the epithelium of 

 the backward continuation of the buccal cavit 



Fig. 15. Section through the point of junction of the salivary ducts with the 

 median oral diverticulum. 



Fig. 16. Section behind the pharynx through the oesophagus. 



