234 Proceedings of tJte Royal Socidy of Victoria. 



Fig. 8^7. Small portion of nerve supplying one of marginal lip 

 organs showinij icanirlion cells on course of nerve 

 fibres. Drawn under Zeiss, C oc. 2. G.C. 

 ganglion cell. 



Fig. 9. View from the ventral surface, much enlarged of the 

 two jaws. 



Fig. 10. One of the jaws showing the depressed groove in the 

 cuticle (C) along which the row of denticles is 

 attached (D). 



Fig. 11. Transverse section of jaw. Drawn under Zeiss, C. oc. 

 2. Cut. cuticle. D. denticle. Gl. glandular 

 structure opening between two consecutive den- 

 ticles. C. circular muscle fibres. L. longitudinal 

 muscle fibres. C.t. connective tissue. 



Fig. 1 2. Transverse section of jaw across a gland lying between 

 two consecutive denticles. 



Figs. 13-16. Sections across the jaw in a plane transverse to 

 the length of the body. Drawn under Zeiss, 

 A. oc. 2. The most anterior section is repre- 

 sented in Fig. 13. In Fig. 15 the right half lies 

 anteriorly to the left half. L. longitudinal 

 fibres. C. circular fibres. H. dorso-ventral 

 fibres. Ph. pharynx. D. denticles. Gl. gland. 

 Cc.G. cerebral ganglion. Bv. blood vessel. S.G. 

 suboesophageal ganglion. R. radial muscles. 

 D.F. dorsal fold of Pharynx wall. L.F. the two 

 lateral folds of Pharynx wall. 



Fig. 17. Much enlarged view of the Posterior Organs (P.O.). 

 Dvt. 11. most posterior diverticulum of crop 

 close to the posterior end of which opens tlie 

 duct from the Posterior Organs. 



Fig. 18. Transverse section of Posterior Organ. Drawn under 

 Zeiss, C. oc. 2. Fid. longitudinal folds on which 

 lie the gland cells. 



Fig. 19. Section across the opening of the duct of the Posterior 

 Organ (D.P.O.) into the diverliculum of the 



