28 
Geni-is DICROCCELIUM « Dujardin, 1845. 
Generic diagnosis. — Fascioliclie: 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 vith pharynx, moderately long esophagus, and long simple ceca* 
Fig. 33. — Drawing from a microscopic preparation showing a fluke in the tissue of the liver: a, ' 
necrotic liver tissue: b. atrophic liver cells: c, .spines on the fluke, showing the outline of the body, \ 
(After Schaper, 1890, PI. 3, fig. 5.) 
Excretory system simifle, tubular. Genital pore median, between the suckers. Copu- : 
latory organs present, but not highly developed. Male organs: Cirrus pouch lies | 
almost entirely anterior of ventral acetabulum; in its posterior end is a more or less ^ 
coiled vesicula seminalis, anterior of this the moderately developed pars prostatica, \ 
Fig. Zi.—Limnsea 
truncatula, nat- 
ural size and en- 
larged. (After 
Leuckart.) 
Fig. 35. — Limnsea pere- 
gra, natural size and 
enlarged. (After 
Leuckart. ) 
Fig. 3G. — 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. — Distoma {Dicrocoelium) Dujardin, 1845; Dicrocoelhini Dujardin of E. 
Blanchard, 1847a; Dicrocselium (misprint) of several authors. 
