120 Proceedings of the Royal Society of Victoria. 



Fig. 14. — A semi-everted proboscis detached from the pro- 

 boscis sheath and with the everted portion slit 

 open to sliow tlie non-everted portion lying 

 within. 



e. r. Eversible region of" the proboscis. 



st. r. Stylet-region. 



n. e. r. Non-eversible region. 



(Other letteiing as before). 



Fig. 15. — Longitudinal section through the stylet-region of 

 the proboscis. Drawn under Zeiss A, oc. 3. 

 c. st. Central stylet. 



gl. p. Glandular ])apilhe of the eversible region. 

 gL z. Zone of glandular cells. 



h. " Handle " in which the central stylet is fixed. 



p. d. Poison duct, leading up to tlie base of the 



central stylet. 

 p. r. Poison reservoir in the posterior half of the 



stylet-region. 



(Other lettering as before). 



Fig. 1G.— Transverse section through a partially everted 

 proboscis. The section passes through the 

 "handle" of the stylet, which is seen in the 

 middle, and the outer portion of the section 

 shows the eversible portion of the proboscis 

 turned inside out and surrounding the stylet- 

 region. Drawn under Zeiss A, oc. 3, camera 

 outline. 



e. c. Til. External circular muscles of the everted portion 

 of the proboscis. 



e. I. m. External longitudinal muscles of the same. 



i. c. tn. Intei'nal circular muscles of same. 



i. I. m. Internal longitudinal mu.scles of same. 



p.n.s. Proboscidean nerve sheath. 



s. r. s. Sac containing reserve stylets. 



(Other lettering as before). 



Fig. 17. — A sac containing reserve stylets, from an unstained 

 preparation. Drawn under Zeiss D, oc. 2, 

 camera outline. 



a. st. Abnormal stylet. 



sf. m. c. Stylet mother cell with commencing stylet. 



