
960 THE AMERICAN NATURALIST. [VoL. XXXVI. 
rounded sac into which radial canals extend; 2 mm. long: in intestine of 
soft-shell turtles (Aspidonectes and Amyda) . C. vesicaudus Nick. (65) 
GENUS PROSTHOGONIMUS. 
Body elliptical; acetabulum larger than oral sucker; 7 mm. long, 2. 8 mm. 
wide: in the white of hen's egg, also in Buteo lineatus and Corvus ameri- 
CONUS o oos eas . . P. ovatus R. (Fig. 61) (34, 80) 
GENUS DICROC(ELIUM. 
Body elongate, lanceolate; suckers near together; testes lobate, close 
behind acetabulum; 4-10 mm. long, 1-2.5 mm. wide. “Stated to be fre- 
quent in sheep in several western states” (Leidy). ‘“ Apparently not in 
North America” (Stiles and Hassall): in cattle, sheep, man, etc. 
D. lanceatum S. et H. (Fig. 82) (21, 84, 85) 
GENUS LYPEROSTOMUM. 
In Corvus americanus . >» . . . . L. plesiostomum v. Linst. (80) 
GENUS HEMIURUS. 
a,. Body cylindrical; appendix from a third the length to twice the length 
of the body; acetabulum much larger than oral sucker; testes not 
near acetabulum; yolk glands compact or slightly lobate ; o. 5-6 mm. 
long: in stomach and pyloric coeca of marine fishes; intermediate 
host, copepods D. pelagicum Stafford (78) 
= H. appendiculatus R. (Fig. 90) (39, 33: 55; ei 24) 
a» Body fusiform; appendix about a third the length of f body; acetab- 
ulum larger than oral sucker ; testes close to acetabulum ; 1.5-3.5 mm. 
long: in Macrourus bairdii. . . H. levis Linton (39, 55) 
a, Body slender, cylindrical; appendix ded. a third the length of body ; 
acetabulum larger than oral sucker; testes distant from acetabulum ; 
yolk glands lobate ; 5.12-5.4 mm. long, 0.75-1 mm. wide: in stomach 
of Remora remora. . . H. monticelli Linton (39) 
. Body slender; appendix About a gem the length of sone A 3.2 mm. 
long, 0.42 mm. wide: in intestine of Pomatomus saltatri. 
H. ocreatus (Mol.) tds (39. 55) 
& 
^» 
GENUS LECITHOCLADIUM. 
a,. Body slender; appendix long; 8-15 mm. long, o.7 mm. wide: in Cory- 
phena hippurus et al. . . L. tornatum (R.) Linton (38, 40, 5 5) 
4, Body slender; appendix long and slender; acetabulum of same size as 
oral sucker; cesophagus wanting; testes just behind vesicula semi- 
nalis; the tubular yolk glands extending into appendix; 10 mm. 
long, 1.14 mm. wide, length of cie 3.6 mm.: in butterfish 
` (Rhombus jrienthen) ea . L.gulosum Linton (40, 55) 
