No.431.] MORTH-AMERICAN INVERTEBRATES. 905 
Testes in same transverse plane or nearly so; intestinal 
ceeca extend to end of body; excretory canal Y-shaped ; 
cirrus sac wanting: in bats and chameleons 
Anchitrema Lss. (44) 
J», Yolk glands compact, or if dendritic, of small extent and not 
along the sides of the body. 
£j. Genital pore in front of acetabulum. 
f. Yolk glands in hinder end of body. 
ñ} Distal ends of intestinal ceca joined; distal ends 
of excretory crura also joined: in marine fish 
Subfamily XXIII. Syncoeliinze 
J,. Yolk glands compact, spherical ; testes in same 
transverse plane: in the stomach 
Progonus Lss. (Fig. 84) (44) 
Ja Yolk glands dendritic: on gills of sharks. 
&,. Intestinal coeca have side branches; testes 
and ovary dentritic ; acetabulum pedun- 
culate; anterior portion of body cylin- 
drical, posterior flat and folded 
Otiotrema Setti (Fig. 85) (44) 
£, Intestinal ceca without side branches; 
ovary deeply lobate; testes in two longi- 
tudinal rows of isolated lobes 
ceelium Lss. (Fig. 86) (44) 
Distal ends of intestinal coeca not joined; testes 
usually in same transverse plane in hinder end 
of body; uterus in transverse folds, passing to 
anterior end of body: in amphibians 
Hal indie Lss. (Fig. 87) (44) 
A,. Yolk glands near or towards the middle of the body 
(except Derogenes) ; excretory crura usually joining 
over the pharynx; small cylindrical or elliptical 
forms, in most of which the hinder end of the body 
is telescopic : in marine fish 
Subfamily XXII. Hemiurine 
z,. Hinder end of body not telescopic (no appendix) ; 
genital pore near branching of intestine. 
J, Testes behind ovary and diagonally behind 
each other; yolk glands in front of ovary; 
all genital glands spherical 
Liopyge Lss. is r 88) ao 
29. 
Ja Testes in front of ovary, in nearly 
transverse plane; yolk poke: bake pe 
behind ovary 
Derogenes Lühe (Fig. 89) (52, 55) 
