98 THE CHANGES FROM STAGE A TO F. 



of the somite which, in the preceding legs, gives rise to the 

 internal vesicle of the nephridia. 



It would be of interest in this connection to observe 

 whether the oviduct of the New Zealand species, in which 

 the generative ducts open between a pair of fully-developed 

 legs, possesses a structure corresponding to the receptaculum 

 ovorum. 



There are rudiments of two pairs of somites behind the 

 somites of the anal papillae in Stage e. One of these is just 

 visible in Stage f. They vanish completely at the end of 

 Stage F. No appendages or rudiments of such are developed 

 in connection with them. 



