
904 THE AMERICAN NATURALIST. [VoL. XXXVI. 
f, Ovary behind acetabulum; suckers large; genital pore near 
pharynx ; no cesophagus present: in cloaca of birds 
Eumegacetes Lss. (Fig. 79) (44, 45) 
J. Ovary in front of acetabulum ; suckers not large 
£j. Genital pore at extreme hinder end: in birds 
Urorygma Brn. (9) 
£2 Genital pore in front of acetabulum ; intestinal coeca not 
reaching acetabulum. 
A, Genital pore median. 
z,. Cirrus sac long; yolk glands in front of acetabu- 
m: in birds and mammals 
Phaneropsolus Lss. (Fig. 77) (44) 
i,. No cirrus sac; yolk glands behind acetabulum: in 
bats and chameleons 
Lecithodendrium Lss. (Fig. 76) (44) 
h,. Genital pore on left edge of body; cirrus sac long; 
genital glands all in front of acetabulum: in am- 
phibians and reptiles 
Prosotocus Lss. (Fig. 69) (44) 
€,. Testes behind acetabulum. 
J; Yolk glands dendritic and along the sides of the body. 
gı- Testes one behind the other; body elongate; intestinal 
ceeca extending to end of body. 
h,. Yolk glands consist of a series of branched tubular 
follicles on each side. 
i. CEsophagus very long ; each intestinal coecum sends 
a long projection forward, giving the digestive 
tract the form of an H; acetabulum often 
pedunculate : in fish 
Accacelium Mont. (Fig. 80) (44 59) 
i, Acetabulum not pedunculate; digestive tract 
not in form of an H; acetabulum in middle o: 
body, the anterior half of which is flat, the 
posterior half cylindrical 
Eurycoelum Brock. (55) 
l, Yolk glands not of tubular follicles, but of spheroidal 
masses; cesophagus short; suckers near together: 
usually in the liver Subfamily XXI. Dicroceeliine 
í» But one yolk gland, the left one, present: in liver 
of birds . . . Athesmia Lss. (Fig. 81) (44) 
z,. A pair of yolk glands present. 
Jı- Body flat and leaf-like 
coat Duj. (Fig. 82) (44 86) 
a» Body cyli 
g due Rue Lss. (Fig. 83) (44) 

