Bull. U. S. F. C. 1 899. (To face page 492.) 
Plate IX 
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i 
81. Ascaris sp. from Sciirnnps oceUatns , continued. Posterior end, 
lateral view, x 50. 
82. Head of young specimen, x 225. 
83. Extreme tip of tail highly magnified. 
84. Ascaris sp. from Cottunculus tliomsonii. Head of female. • 170. 
85. Upper lip. x 170. 
86. Posterio. end, lateral view. x 27. 
87. Posterior end of male, lateral view, x 22. 
88. Ascaris sp. from Pseudopleuronecles americanus. View of head, 
highly magnified. 
89. Posterior view of male, lateral view, x 50. 
90. Ascaris sp. from Mustelus canis. Posterior end, lateral view. 
X 168. 
91. Ascaris sp. from Hcmitrvpterus americanus. Posterior end of 
female, x 60. 
92tr. Dorsal view of head, x 180. 
926. Ventral view of head, x 180. 
93. Upper lip of same, x 180. 
I 94. Posterior end of small specimen, x 60. 
95. Ascaris sp. (probably same species as foregoing) from Glyptoceph- 
alus cynoglossus. Posterior end. x 42. 
I 96. Extreme tip of tail, x 210. 
97. Ascaris sp. from Microrjadvs turaend. Dorsal view of head, x 225. 
] 98. Posterior end, lateral view, x 75. 
j 99. Extreme tip of same, x 300. 
