U. S. NATIONAL MUSEUM 



PROCEEDINGS, VOL. 



50-52. Lepocreadium relrusum, new species: 50, From Pneumatophorus grex, ventral view; 



51, dorsal view; 52, o\'aries of two showing varieties of lobation. 

 53-56. Lepocreadium trullaforme, new species: 53, From Menticirrhus saxalilis; 54, from 



Morone americana, somewhat distorted by compression; 55, small distome from 



young M. saxatilis; 56, another from same host. 

 57. Bianiu7n pliciium (Linton): From Sphoeroides maculatus, ventral view, lateral 



margins of neck extended. 



