Bull. U. S. F. C. 1899. (To face page 492.) 
S 
Plate XVII. 
205. Cucullanus plobosus Zeder, from Lophius piscatorius. Posterior 
end of male, x 65. 
206. Lateral view of posterior end of male from Gadus callarias. 
X 200. 
207. Cucullanus sp. from Fundulus heteroclitus. Posterior end of 
male, lateral view; life, x 300. 
208. Ventral view of posterior extremity, x 300. 
