28 
Genus DICROCCELIUM « Dujardin, 184B. 
Gexeeic diagnosis. — Pasciolicla?: Body of rather slender build, elongate, and flat; 
anterior and posterior ends more or less pointed. Suckers rather approached to each 
other; ventral acetabulum usually more highly developed than the oral sucker. Skin 
smooth. Intestine with pharynx, moderately long esophagus, and long simple ceca. 
Fig. 33. — Drawing from a microscopic preparation showing a flute in the tissue of the liver: a, 
necrotic liver tissue; 6. atrophic liver cells: c. spines on the fluke, showing the outline of the body, 
(After Schaper, 1890, PI. 3, fig. 5.) 
Excretory system simple, tubular. Genital pore median, between the suckers. Copu- 
latory organs present, but not highly developed. Male organs: Cirrus pouch hes 
almost entirely anterior of ventral acetabulum; in its posterior end is a more or less 
coiled vesicnla seminalis, anterior of this the moderately developed pars prostatica, 
Fig. 34 . — Limnsea 
truncatula, nat- 
ural size and en- 
larged. (After 
Leuckart.) 
Fig. 35 . — Limnsea pere- 
gra, natural size and 
enlarged. (After 
Leuckart. ) 
Fig. 36 . — Limnsea humilis, natural size and enlarged. 
(After Binney.) 
and a comparatively long, thin cirrus (including ductus ejaculatorius); testicles com- 
pact, one quite straight behind the other, directly posterior of the ventral sucker. 
Female organs: Ovary about median, smaller than the testicles, and immediately . 
Synonyms. — Distorna {Dicroccelium) Dujardin, ISdo; Dicroccelium Dtijardin of E. 
Blanchard, 1817a; Dicrocseliurn (misprint) of several authors. 
