No. 431.] MWORTH-AMERICAN INVERTEBRATES. 893 
d,. No ventral papilla present. 
e€, Testes simple, not lobate or dendritic. 
f, Acetabulum terminal with excretory pore in its 
center; testes often fused to form a single body: 
in the rectum of amphibians 
Diplodiscus Dies. (Fig. 12) (41) 
Ja- Excretory pore not in acetabulum ; testes in extreme 
hinder part of body with ovary in front of one of 
them; genital pore with a muscular fold around 
it; very small worms: in the stomach of herbi- 
n o . . Balanorchis Fisch. (11) 
Testes dendritic, near center of body. 
J, Intestine long and serpentine; no bulblike widen- 
ing of cesophagus; ovary near acetabulum: in 
mammals . . . . . Cladorchis Fisch. (11) 
Ja Intestine straight; esophagus with bulblike widen- 
ing; ovary behind testes, which lie one behind 
the other and are each cross shaped 
Chiorchis Fisch. (11) 
Š. Acetabulum in the mid-ventral surface, but not at posterior end. 
orms hermaphroditic . Family II. Fasciolidæ 
d,. Ovary between testes ns p. 6): 
d@,. Ovary behind testes (see p. 903). 
d,» Ovary in front of testes 
é,. Uterus does not extend back of testes. 
f, Intestinal ceca long and with lateral projections ; 
yolk glands very voluminous: usually in the liver 
or lungs of mammals Subfamily I. Fascioline 
Worms of large size, broad and leaf-like ; 
acetabulum near anterior end; intestinal 
. coeca, testes, and ovary profusely branched. 
h,. Body elongate; anterior end conical and 
more or less set off from remainder of 
worm . Fasciola L. (Fig. 13) (44,83) 
ñ Body circular 
Fasciolopsis Lss. (Fig. 14) w 
g+ Worms not of large size; cem ranches 
intestinal coeca short an 
h,. Testes two, one behind ie other: in liver 
of Cetacea 
Campula Cob. (Fig. 15) (4, = 
A, Testes numerous, in two longitudinal rows 
intestinal coeca with e two leinchés, 
which pass anteriad : in 
Pleorchis eg (Fig. 16) (86) 
2* 
Ci 
Er 
