U. S. NATIONAL MUSEUM 



PROCEEDINGS. VOL. 79. ART. 31 PL. 1 



0/mm 



VlANNAIA BURSOBSCURA 



1, Female; 2, bursa of male, dorsal view; :<, tail end of female; A, bursa of male showing structure within 

 tiursa; 5, tail end of male showing spicules; 6, esophagus. 



