Bull. U. S. F. C. 1899. (To face page 492.) 
Plate X. 
100. Ascaris sp. from Pomatomus saltatrix. Lateral view of head. 
X 225. 
101. Dorsal view of head, x 225. 
102. Posterior end, lateral view, x 50. 
103. Extreme posterior tip. x 225. 
104. Anal glands, optical section, x 225. t, Intestine; yl, glands; 
r, rectum. 
105. Head of younger' specimen than the foregoing, x 50. 
106. Posterior end. x 50. 
107. Ascaris sp. from Cynoscion rcgalis. Head, x 225. 
108. Posterior end. x 225. 
109. Posterior end of a specimen from another lot. x 150. 
110. Ascaris sp. from Stenotomus chrysops. Head, x 225. 
111. Posterior end of same, x 75. 
112. Extreme posterior end. x 225. 
113. Head of specimen from another lot. x 170. 
114. Posterior end. x 170. 
115. Head of another specimen, removed from capsule on peritoneum. 
The embryonic cuticle is broken, showing the rudimentary 
jaws. X 225. 
116. Posterior end. x 75. 
