Flate 13. 



Zygophylax chazaliei, page 15. 

 Fig. 1. Part of the central tube after maceration in boiling KHO. This shows especially 



well the mode of origin of the peripheral tubules, x 60. 

 Fig. 2. The branching of a peripheral tube. 

 Fig. 3. The distal end of one of the pinnae, x 60. 

 Figs. 4 and 5. Nematothecae. x 300. 

 Fig. 6. Two adjoining peripheral tubes through which the hydrotheeae project, x 60. 



