FIG. 66. Polygordius neapolitamis. 



A, the living animal, dorsal aspect, about five times natural size. 



B, anterior end of the worm from the right side, more highly magni- 

 fied, showing the prostomium (Pr. st), peristomium (Per. st}^ tentacles 

 (/), with setze (s) and ciliated pit (c. p}. 



c, ventral aspect of the same : letters as before except AftA, mouth. 



D, portion of body showing metameres (Mtmr) separated by grooves 

 (gr\ 



E, posterior extremity from the ventral aspect, showing the last three 

 metameres (Mtmr} separated by distinct grooves (gr], the anal seg- 

 ment (An. seg) bearing the anus (An} t and a circlet of papillae (/). 

 (After Fraipont.) 



