Text-figure 10. 



oes. 



0-lmm. 



b)c. 



0-lmm. 



0-lrnm. 



Tanqua tiara. Transvei'se sections tlirough the anterior re.^-ion. A, at about the 

 middle of the head-bvilb ; B, at the back of the head-bulb; C, at the level 

 of the cuticnlar collar. 



Text-figure 11, 



Text-figure 12. 



iff 



1 Text-fig. 11. — Tanqna tiara. Terminal portion of spicule. 



Text-lig. 12. — Tanqna tiara. Tail of female ; a, lateral; b, ventral view. 



18* 



