46 
The Asiatic Amphistome — GASTRODISCUS HOMINIS« (Lewis & McConnell, 
1876) Fischceder, igoi — of Man. 
[Figs. 72 to 78.] 
Specific diagnosis. — GaMrocUscii.s: 5 to 8 mm. long, 3 to 4 mm. broad; reddish in 
color (fresh specimen). Genital pore about in middle of the anterior portion at 
Fig. 72. — A portion of human intestine slit open, with specimens of Gastrodiscus hominis. Natural 
size. (After Lewis & McConnell, 1876, pi. 3, fig. 1.) 
bifurcation of the intestine. Testicles 2, lobate; vas deferens very sinuous. Disk 
without papillae. Eggs oval, 150 p by 72 p with operculum. 
Habitat. — Cecum and colon of man {Homo sapiens). 
Geogeaphic disteibution. ■ — Asia. 
^Synonyms. — Amphistoma hominis 'Lewis & McConnell, 1876; Amphistomum hominis 
(Lewis & McConnell) Davaine, 1877; Gastrodiscus hominis (Lewis & McConnell) 
Fischceder, 1901. 
Bibliogeaphy. — For the cases thus far reported see Lewis & McConnell (1876, pp. 
182-186), Dobson (1893a, 18936), and Giles (1892, 1893). Judging from the writings 
of Dobson and Giles, this parasite soems to be much more common in India than is 
generally supposed. 
