Bull. U. S. F. C. 1899. (To face page 304.) 
Plate 43 . 
Ascaris clavatafrom Pollachius virens. 
£ osterior enf l °f male, lateral view, x 96 
10b. Posterior end of female, lateral view. 96. 
Ini’ if ral . lsverse section through oesophagus. 300. 
iw. beetion of lateral wing, x 300. 
Ascaris lidbcna sp. nov. from Opsanus fau. 
P ea< ^ °f a male 30 mm. in length. 280. 
110. Dorsal lip of same, x 280. 
i}. 1 ’ 4 ate . ral !iP same. ■ 280. 
!i o' S oction 01 lateral lip, female, x 280. 
iji' £ osterior mid of male, lateral view. - 70. 
jjt - 4f ansv .erse section through oesophagus, female. • 70 
no. l lan ot arrangement of anal papilla;. 
Acanthocheilus niclifex. sp. nov. from Galeocerdo tigrinus. 
116. Adult worm lying in crypt in .submucosa of stomach wall, about 
natural size. 
ni, Mucosa; sm, submucosa; w, worm. 
117. Ventral view of mouth, x 220. 
I, Lower lip. 
118. Posterior end of small female. 40. 
119. Ventral view of same. < 40. 
Ichtheonema sanguineum from Paralichthys dent at us. 
120. Head, x 70. 
121. Transverse section of body, x 70. 
i, Intestine; If lateral field; in, muscles; u , uterus with young. 
