studies M.L.VolVI,Pl.XlI. 



23 



29 



~ rpc 

 -I'p c'. 



'§--tJ>e 



'^rfc 



ilastopore 



24 



25 



-?fc 



30 



larval anus 

 (UastoporeJ g^ 



I stom. 

 larval rectum 



36 



Ihy -':^_^ 



ip'c'. 



Ed"wiii Wilsoa Cambridqc. 



