538 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 57. 



Genus METAGONIMUS Katsurada, 1913. 



Generic diagnosis. — Heterophyidae : Prepharynx short; pharynx 

 much nearer to the oral sucker than to the bifurcation of the intes- 

 tine. Intestinal ceca extend into the posterior portion of the body, 

 reaching the level of the posterior testis or extending behind it. 

 Ventral sucker near the right side of the body near the right intes- 

 tinal cecum, near or in front of the middle of the body. Genital 

 sinus immediately in front of the ventral sucker and opening to the 

 exterior in common with the latter through the genital pore. Testes 

 globular or oval, in posterior end of body, right testis obliquely 

 behind the left. Seminal vesicle well developed, retort-shaped, lo- 

 cated to the left of and behind the ventral sucker. Ovary oval or 

 globular, median in location, a short distance in front of the anterior 

 testis. Seminal receptacle behind or to the right of the ovary. 

 Vitellaria consist of a few rather large lobules located in the lateral 

 fields and dorsal of the intestinal ceca and extending from the level 

 of the anterior border of the ovary into the post-testicular region, 

 but not crossing the excretory vesicle. Uterus with rather numerous 

 coils occupies most of the posterior portion of the body between 

 the testes and the level of the genital sucker. Eggs about 30 [jl in 

 length. 



Type species. — Metagonimus yokogawai (Katsurada, ?1912) Kat- 

 surada, 1913. 



METAGONIMUS YOKOGAWAI (Katsurada. ? 1912) Katsurada, 1913, 



Figs. 5-10. 



?1912. Heterophyes yokogawai Katsurada, ?1912 (adults in man, dog, and 

 other mammals; immature stage in PlccogVossus altivelis; 

 Formosa ) . 

 1913. Metagonimus yokogatoai (Katsurada) Katsurada, 1913 in Toko- 

 GAWA, 1913 (May), pp. 49-77, 1 pi., figs. 1-15; summary in Ger- 

 man, pp. 3-4. 

 1913. Tokogawa yokogatoa (Katsurada, ?1912) Leipek, 1913 (July), pp. 

 282-285, fig. 31 (type of Yokogawa; misprint for Yokogawa yoko- 

 gatoai). 

 1913. Tocotrema yokogawa (Katsurada, ?1912) Leipeb, 1913, p. 282 (mis- 

 print for Tocotrema yokogawai) . 

 1913. Metagonimus ovatus Yokogawa, 1913, pp. 45-49, 1 pi., figs. 1-2 



(?host; ?.Tapan). 

 1915. Loossia romanica CiimEA, 1915, pp. 446-453, pi. 1, figs. 1-3 (type 



of Loossia; in dog; Roumania). 

 1915. Loossia parva Ciubea, 1915, pp. 453-454, pi. 1, fig. 4 (in cat; Rou- 

 mania). 

 1915. Loossia dohrogiensis Ciurea, 1915, p. 454 (in Pelecanus onocro- 

 talus; Roumania). 



