Bui!. U. S. F. C. 1 899. (To face page 492.) 
Plate XIII. 
147. Ascaris rp. from Pamlirlitliys dentatus , continued. Posterior end 
of specimen shown in figure 146. x 75. 
148. Head of specimen from another lot. ■ 225. 
149. Posterior end of same, x 225. 
150. Posterior end of specimen from another lot. x 75. 
151. Posterior end of another from a different lot. x 225. 
152. Ascarisap., immature, from Paralichtliysoblongus. Head, x 165. 
158. Posterior end, lateral view, x 45. 
154. Ascaris sp., immature, from Bothus maculalus. Lateral view of 
head, x 210. 
155. Dorsal view of head, x 210. 
156. Posterior end. x 24. 
157. Ascaris sp., immature, from Hemitripterus amcricanus . Head. 
X 150. 
158. Head of younger specimen, x 150. 
159. Posterior end of same, x 150. 
160. Ascaris sp. from Merhiccius bilinearis. Head, x 225. 
161. Posterior end. x 120. 
162. Head of specimen from another lot. x 225. 
163. Ascaris sp. from Antimora viola. Head, .170. 
164. Head of another specimen, x 170. 
165. Posterior end of same, x 170. 
166. Ascaris sp. from Phycis tenuis. Head. < 225. 
167. Posterior end. x 225. 
