Ppp 
Bull. U. S. F. C. 1899. (To face page 492.) 
Plate VI. 
40. Ascaris inquire sp. nov„ from Jiaehyccntron cana'lus. Ventral 
view of head. < 220. 
47. Upper lip. X 220. 
Posterior end, lateral view, x 05. 
Posterior extremity, x 220. 
Transverse section through anterior end. x.100. 
51. Immature nematode encapsuled on intestine of Mnla main. 
Head, x 700. 
52. Posterior end, lateral view, x 100. 
53. Immature nematode (Ascaris) from T rophyris chuss. Lateral 
view of head, x 160. 
54. Lateral view of posterior end. x 100. 
55. Ascaris habena Linton, young, from Opsanus tail. Anterior end 
showing the embryonic cuticle in the act of sloughing off. 
Sketched from life.' Note that the cuticle of the pharynx <■' is 
also separating, x 300. ... „ 
50. a-i , Ova showing different stages ol development, liie. 1‘orms 
like e and f noticed on different occasions. The embryo i was 
ill an ovum which had been kept 2 days in sea water. 
