HETEROPHYES 



It is also found in dogs and cats in Egypt, Japan, and Formosa; 

 in man in Khartoum (eggs 0-026 x 0-013 mm.), also adults; and in 

 dogs in the same town. 



Morphology. — Heterophyes heierophyes is pear-shaped, very narrow in 

 front, broad behind; 2 milHmetres in length by i millimetre in breadth, but 

 can stretch to quite double this length. Cuticle with rectangular scales, and 

 with numerous glands on the anterior ventral surface. Oral sucker o-i milli- 

 metre and ventral 0*35 millimetre in diameter. (Esophagus relatively long. 

 Intestinal caeca end posteriorly near each other. Testes situated posteriorly, 

 not quite on the same level on each side of the excretory vesicle; ducts join 

 in a large vesicula seminalis, from which a canal unites with the metatrema, 

 and then discharges into the genital cavity, the pore 

 of which is placed laterally, surrounded by an annular 

 muscular elevation, provided with seventy-five to 

 eighty branched chitinous spines, probably intended 

 to help in sexual intercourse. 



The ovary lies medianly, and its duct passes 

 backwards to join the receptaculum seminis, which 

 is just in front of the testes. 



Here also joins the vitellarian duct of the yolk 

 glands, which also lie laterally in the posterior third 

 of the body. The uterus is coiled throughout the 

 posterior part of the body. The canal of Laurer is 

 present. The eggs have thick shells, and are 0*03 

 millimetre in length and 0*017 millimetre in breadth, 

 containing a miracidium. 



Habitat. — ^Small intestine. 



Life-History —Unknown . 



Pathogenicity. — Perhaps 

 parasite is very small, and 

 be overlooked. 



nil, but the 

 may therefore 



Genus Metagonimus Katsurada, 1913. 



Synonym. — yo^og'^^w^^ Leiper, I913. Fig. 221. —Heterophyes 



Definition. — Heterophyiidse with suckers heterophyes. 



dextro-laterally situate. (After Looss, from 



Type Species. — Metagonimus yokogawai Braun's ' Animal Para- 



Katsurada, I913. " sites of Man,' English 



edition. 



a, Schematic X 35 ; 6, 

 natural size; c, eggs x 

 250 ; d, spine x 700. 



Metagonimus yokogawai Katsurada 1913. 



Synonym. — Yokogawa yokogawai Leiper, 

 1913. Leiper now believes that this fluke is 

 the same as one previously described by Kobayashi cis Lax otrema 

 ooatum, n.g., n.sp. 



Definition. — ■Metagonimus 1-5-2-5 x 0-4-0-7 mm., with body 

 covered with nail- shaped spines about 10 microns in length, with a 

 characteristic sac-like acetabulum placed deeply in the body, and 

 not opening on the ventral surface, but dextro-laterally. 



History.- — It was found in Japan in the upper or middle part of the 

 jejunum, rarely the caecum, of man and mammals. They enter and 

 destroy the solitary glands. 



Morphology. — Metagonimus yokogawai is a small fluke possessing 

 the characters given above. The oral sucker is 77-85 microns in 



