
964 THE AMERICAN NATURALIST. [Vor. XXXVI. 
“Head compressed oval, convex anteriorly; mouth minute, not bor- 
dered. Body compressed oblong oval. Ventral acetabulum immersed 
between body and head. Length 2} lines, breadth } of a line.” From 
the intestine of Rusticola minor 
Distomum (Clinostomum) dubium Leidy (21, 6) 
* Body elongated, sublinear, depressed, unarmed, transversely rugose, 
posteriorly attenuate. For about 6.5 mm. back of the ventral sucker the 
body was filled with the voluminous folds of the uterus”; 20 mm. long, 
3.2 mm. wide: in stomach of Raja levis 
Distomum veliporum (Creplin) Linton (38) 
Body cylindrical, posterior portion larger than anterior; testes side by 
side, immediately behind acetabulum; 18 mm. long, 4.5 mm. wide: in 
stomach of swordfish . . . . . . Jéstomum clavatum (RÀ (21, 38) 
PARASITIC IN MOLLUSKS. 
Body oval; acetabulum large, in center of body; intestine convoluted, 
passing to extremity of body; genital orifice halfway between acetabulum 
and hinder extremity of body; length } line, breadth 1 line: in pericar- 
dium of Helix alternata and H. albolabris üfierinediate- host) 
Distomum helicis Leidy (19, 21) 
— Distomum vagans Leidy (18) 
Body fusiform ; suckers large ; acetabulum near the middle of the body ; 
oral sucker “ with a style inserted in the upper lip "; o.2 mm. long, .o8 mm. 
wide: in liver of //yanassa obsolata . . . Distomum lasium Leidy (32) 
PARASITIC IN CRUSTACEANS. 
Body cylindrical; acetabulum larger than oral sucker; r.25 mm. long; 
o.4 mm. wide; in Apus /ucasanus . . Distomum apodis Packard (75) 
Body clavate, with a long, narrow tail (a cercaria); 0.25-0.4 mm. long: 
in muscles, liver, and intestine of Planorbis and Limnza 
Distomum ascoideum Leidy (24) 
GENUS SCHISTOSOMA. 
Male 4-14 mm. long, 1 mm. wide; female 13-20 mm. long, o.28 mm. 
wide: in blood of man and cattle (?) 
S. haematobium Bilh. (Fig. 107) (85) 
GENUS KCELLIKERIA. 
Longer diameter of reniform pr 1.74 mm., shorter diameter 
1.09 mm., diameter of neck 0.13 mm. : in cysts in intestinal wall of Spanish 
mackerel. uo ^ 2... . K filicolle R. (Fig. 108) (40) 
