
954 THE AMERICAN NATURALIST. [Vor. XXXVI. 
ő, Acetabulum emarginate; 4-24 mm. long, 2-12 mm. wide : in intes- 
tine of terrapin . dé. ane P. grande Dies. (29) 
Body conical or subconical. 
6,. Acetabulum large and subterminal; testes lobate, median: in 
stomach of sheep and cattle . P. cervi Zed. (Fig. 9) (85, 87) 
Č, Acetabulum in ventral surface not quite at posterior end, emargi- 
nate; genital pore near anterior end often in a papilla or retracted 
in a depression ; body triangular in cross section : in the muskrat 
P. subtriquetrum R. (45) 
ur 
GENUS DIPLopiscus. 
Acetabulum large; body tapering anteriorly : in intestine of frogs 
D. subclavatus R. (Fig. 12) (21, 80, 79, 41) 
GENUS FASCIOLA. 
& 
" 
. In mammals; worms of large size. 
6,. Worms 18-50 mm. in length, 4-13 mm. in breadth; anterior end 
distinctly set off from remainder of body; broadest part of worm 
in front of its middle: in cattle, sheep, deer, man, ef a7. 
F. hepatica L. (Fig. 13) (83, 85, 93) 
à, Worms 20-100 mm. long, r1-26 mm. broad; anterior end indis- 
tinctly set off; broadest part of worm back of its middle ; body 
flesh colored: in cattle . . Dist. hepaticum Curtice (83) 
Dist. carnosum Hassall (83) 
Dist. americanum Hassell (83) 
Dist. texicanum Francis (83) 
Dist. crassum Leidy (83) 
= F. magna Bassi (83, 85, 93) 
4, In birds; worms not of large size; body piriform; 14 mm. long: in 
lungs of kingfisher . . . . Dist. trapezium Leidy (32, 81) 
= F. reticulata R. Wr. (97, 44) 
GENUS FASCIOLOPsis. 
Body nearly circular ; 15 mm. long, 12 mm. wide; in liver of an Indian 
elephant (in Boston). . . . . . F., jacksoni Cob. (Fig. 14) (83, 44) 
GENUS PLEORCHIS. 
Body linguiform; 14} or I5 pairs of testes present; 5.25 mm. long, 
1.5 mm. wide: in lung of a turtle (Sternotherus odoratus) 
P. mollis (Leidy) S. et H. (82) 
GENUS PARAGONIMUS. 
Body red in life; suckers small ; ovary to left of acetabulum; 8-20 mm. 
long, 4-8 mm. wide: in lungs of cat and dog, e£ al., and possibly encysted 
in the muscles of swine (Agamodistomum sp.) in a larval condition 
ae P. westermanni Kerb. (Fig. 17) (93, 87) 
