No. 431.] NORTH-AMERICAN INVERTEBRATES. 903 
z,. Acetabulum small, about size of oral sucker ; cirrus 
sac large and extending back of acetabulum; 
yolk glands dendritic, extending in front of ace- 
tabulum : in turtles 
Cymatocarpus Lss. (Fig. 72) (44) 
łą Acetabulum very large; cirrus sac small, in front 
of acetabulum; yolk glands lobate, behind 
acetabulum: in amphibians and reptiles 
Brachyceelium Duj. (Fig. 73) (44) 
A» Body short, oval, usually spiny. 
4,. Testes behind and ovary to right of acetabulum. 
Jı» Genital pore median, in front of acetabulum; 
yolk glands, one on each side of acetabu- 
lum: in bats 
Pycnoporus Lss. JÁ i 74) (44) 
Ja Genital pore at left side of acetabu 
Subfamily XVII. Mod aiti 
&,. Yolk glands lobate, in hinder part of body ; 
vesicula seminalis large, in front of 
acetabulum ; nospines: infresh-water fish 
Microphallus Ward (Fig. 75) (92, 94) 
&,. Intestinal coeca reach a ai: beyond ace- 
um; spines presen 
kovilendlié 3. et H. its: 71) (44. 15) 
f, Testes in front of or on each side of acetab- 
ulum. 
Genital pore median, between oral sucker and 
acetabulum; testes one on each side of and 
ovary to left of acetabulum. 
£,. Genital pore near acetabulum; aesophagus 
long; yolk glands behind acetabulum; 
no cirrus sac: in bats and chameleons 
iu E n Lss. (Fig. 76) (44) 
£, Genital pore n ; esophagus 
short ; yolk gasis ri in iot of acetab- 
ulum; long cirrus sac present: in birds 
and mammals 
Phaneropsolus Lss. (Fig. 77) (44) 
Ja Genital pore at left side of body; acetabulu 
in hinder part of body ; all the genital glands 
in front of them; cesophagus short: in frogs 
Brandesia Stoss. (Fig. 78) (44) 
Ii 
4,. Ovary behind testes. : 
e, Testes in front of acetabulum, in same transverse plane. 
