412 



Mr. H. A. Baylis an a 



then doubles back again, and, running back to nearly the 

 level of the vulva, again doubles forward. The posterior 



Fig. 4. 



Falcaustra siumensis. Tail of male, lateral view. 

 Lettering as in fig. 3. 



uterus runs straight back from its origin to about 4 mm. 

 from the posterior end of the worm, then in a similar way 



