No. 432.] MORTH-AMERICAN INVERTEBRATES. 961 
GENUS LECITHOCHIRIUM. 
Body cylindrical; 2-6 mm. long: in stomach of Anguilla chrysypa 
L. grandiporum (R.) Linton (38, 55) 
GENUS LECITHASTER. 
Body fusiform; testes immediately behind acetabulum; 1-1.5 mm. long: 
in intestine of Cottus scorpius Dist. mollissimum Lev. (33 
= L. bothryophorus Olss. (Fig. 93) (44, 55) 
GENUS PRONOPYGE. 
Body elongated, elliptical, flattened; 2-3 mm. long: in stomach of 
| Trichinous lepturus. . «. . Dist. gastrocolum Leidy (32) 
= P. ocreata Mol. et R. (Fig. 92) (81, 55) 
GENUS DEROGENES. 
Body elongate; acetabulum very large, in middle of body; testes close 
to acetabulum; 2 mm. long: in stomach of Cottus scorpius et al. 
D. varicus O. F. Mil. (33, 52) 
GENUS PROGONUS. 
Body elliptical; acetabulum very large, in middle of body; 2 mm. long: 
in stomach of Cottus scorpius et al. P. miilleri Lev. (Fig. 84) (33) 
GENUS HALIPEGUS. ; 
Body elongated; acetabulum larger than oral sucker, in center of body ; 
10 mm. long: in Eustachian recesses and mouth of frog 
H. ovocaudatus Vul. (Fig. 87) (63, 79, 53) 
GENUS ACCAC(LIUM. 
Body cylindrical, *dorsal surface and lateral margins armed with 
spheroidal tuberculate spines”; “twenty flat spines, more or less, 
on the inner margin of the oral sucker”; 8 mm. long, 0.72 mm. 
B 3 A. contortum (R.) Linton (Fig. 80) (38) 
a, Body cylindrical and slender; acetabulum larger than oral sucker and 
ona long peduncle; testes near center o body; no spines present ; 
yolk glands ** in slender, threadlike folds, centrally situated ” ; 35 mm. 
long, 1.12 mm. wide: in intestine of Mola mola 
$ A. nigroflavum (R.) Linton (38, 39) 
a, Body cylindrical, without spines ; acetabulum twice as large as ora 
sucker and pedunculate; 14 mm. long, 1.7 mm. wide: in intestine of 
Mola mola . . . A. macrocotyle (Dies.) Linton (38, 39, 40) 
a, Body cylindrical, slender ; acetabulum pedunculate, *: consisting of four 
foliate flaps " ; 6-8 suckerlike structures in mid-dorsal line at anterior 
end of body; 12 mm. long, 1.28 mm. wide: in intestine of Mola 
dE ee que Amor tote no A. foliatum Linton (38) 
wide: host?. . 
