U. S. NATIONAL MUSEUM PROCEEDINGS. VOL. 79. ART. 31 PL. 2 



VlANNAIA BURSOBSCURA AND GNATHOSTOMA TURGiDUM 



1, Spicules and gubernaculum of \'. hursobscura: 2, tail end of G. turgidum: 3, G. 

 lurgidum, body spines immediately behind head: 4, G. turgidum, body spines at 

 end of esophagus; 5-7, G. turgidum, body spines near and at end of spinous area. 



