523 
4 A slightly schematic cross-section, combining the anatomical features of three 
successive cross-sections, taken on the level of the origin of the oviduct from the 
ovary. Scale = 0.01 mm. — X 350. 
5 A somewhat idealized view to show the construction of the ventral sucker 
apparatus and the terminations of the genital ducts. The drawing is based on 
the series from which fig. 5 was drawn and given more depth than that of the 
section. As a fact the uterus and the prostate gland are not in the median plane 
while the ductus ejaculatorius and atrium are, X 500 
6 A still more diagrammatic view of the terminations of the genital ducts all 
tne parts being shown as if in the same plane in a transverse section X 500., 
7 A whitish, globular cyst from the pectoral fin of a sun-fish from Chautauqua 
Lake, New York, containing an immature specimen of C. chyli. The worm is seen 
ventrally. The intestinal coeca are filled with highly refractive droplets, beneath 
them the excretory chambers appear filled with globular bodies. Scale, 0.1 mm 
X 100. 
