38 PROCEEDINGS OF THE NATIONAL MUSEUM vol.81 



both species; there is, however, a greater tendency for the testes to 

 be opposed in A. zalophi than in A. donicus. 



Genus PHOCITREMA Goto and Ozaki, 1930 



Generic diagnosis. — Heterophyidae : Body fusiform in shape, cu- 

 ticle spiny. Oral sucker terminal; acetabulum not inclosed in a 

 genital sinus. Prepharynx shorter than esophagus; intestinal ceca 

 simple and terminating at the anterior border of testes. Genital 

 pore median, immediately preacetabular ; testes almost directly 

 opposite each other in j^osterior part of body; seminal vesicle 

 slender, C shaped, lying free in parenchyma. Ovary oval, pre- 

 testicular, situated to right of median line ; seminal receptacle large 

 and situated anteromedian of ovary; vitellaria lateral, in posterior 

 half of body ; uterus v^ith few transverse coils extending intercecally 

 and extracecally between testes and genital pore. 



Type species. — Phocitrema fusiforme Goto and Ozaki, 1930. 



Remarks. — Goto and Ozaki (1930) place this genus in the family 

 Opisthorchiiclae. It appears to the writer, however, that its affini- 

 ties are with the Heterophyidae rather than with the Opisthorchiidae, 

 and it is included in this family in spite of the apparent absence of 

 some characters which would definitely determine its systematic 

 position. 



PHOCITREMA FUSIFORME Goto and Ozaki. 1930 



Plate 9, Figxjee 40 



Description. — Pliocitreina: Body fusiform in shape, 1.16 mm to 

 1.4 mm long by 500/>i to 620jii wide. Cuticle covered with minute 

 spines. Oral sucker terminal, SO/x long by 60/i wide; acetabulum 

 120/x in diameter, slightly preequatorial in position. Prepharynx 

 80^ long by 60/>i wide ; esophagus 120ja to ISO/n long, bifurcating about 

 midway between pharynx and acetabulum; intestinal ceca terminate 

 at the level of the anterior border of the testes. Genital pore median 

 and situated immediately cephalad of the acetabulum; seminal vesicle 

 elongate, cylindrical, forming a transverse loop between ovary and 

 acetabulum ; vas deferens slender, surrounded by glandular cells, ex- 

 panding at anterior margin of acetabulum to form a bulbous pars 

 prostatica which is surrounded by conspicuous gland cells. Testes 

 oval or reniform in shape, 160/li to 240)ii by 120/i, to 140/x, situated 

 opposite each other in the anterior part of the posterior fourth of 

 body. Ovary ovoid, about the size of one of the testes, situated to 

 the right of the median line in front of the right testis. Seminal 

 receptacle large, situated obliquely anterior to ovary. Vitellaria 

 consist of five to seven groups of small follicles on each side of the 



