Bull. U. S. F. C. 1899. (To face page 304.) 
Plate 40. 
Distomum sp. from Paralichthys clcntatus. 
73. Ventral view, life. • 100. 
^4. Outline of anterior end, dorsal view, life, x 100. 
75. Flat scale-like spines from body, x 100. 
Immature di stoma encysted in skin of Ta u t ogolabrus adspersus. 
76, 77, 78. Outlines of three individuals, life. 100. 
/9. Anterior end, dorsal, life; sketch showing irregularly papillose 
structure, x 100. 
80. Cysts with young distoma, optical section, life, x 100. 
em, Young distomum; cy , connective-tissue cyst; pg, mass of 
pigment accumulated about cysts; pg.c , pigment cells. 
81. Single cyst, optical section, life, x 100. 
Encysted ora, from Moronc americana. 
82. Ova and pigment, from serous coat of liver, x 300. 
cy, Connective-tissue cyst containing ova; e, ova with accumu- 
lation of pigment. 
83. Cysts from same, x 300. 
cy, Cyst formed about a single ovum; tv, cyst containing waxy 
secretion. 
84. Single cyst from same. - 440. 
e, Ovum; w, waxy secretion; cy, connective-tissue cyst. 
