58o 



TREMATODA 



mediate host. The first intermediate host and the method ot 

 infection of the fish are unknown, but Melania lihertina is suspected. 

 ■ Habitat. — It is found in cats, dogs, hogs, and men. 



Pathogenicity.- — Enlargement of the Hver, and diarrhoea. 



A Possible Feline Clonorchis (or Opisthorchis). 



Looss draws attention to the fact that Ijima, in 1 886, describes a Distomum 

 from the liver of a cat in Japan, with fine spines, and smaller than C. endemicus, 



which is to be looked upon as a normal parasite 

 ^ 3 o of the cat. It is only 4* 5 millimetres in length 



by 0'9 millimetre in breadth. It may be a 

 Clonorchis or an Opisthorchis. 



Katsurada, in 1900, published a paper based 

 upon seventy-six post-mortems with an 

 enormous number of parasites, among which 

 he mentioned three found in a man from the 

 province of Saga, with an average length of 

 5-16 millimetres and breadth of 0-96 milli- 

 metre, which Looss considers can only be 

 explained as an infection with a feline species. 



Habitat. — Cats and man ( 



FAMILY DICROCCELIIDiE 

 Odhner, 1910. 



Definition. — Fascioloidea, hermaphro- 

 ditic, without spiny collar around the 

 oral sucker, and with the ovary behind 

 the testes. 



Type Genus. — Dicrocceliunt Dujardin, 

 1845. 



Dicrocoelium Dujardin, 1845. 



Definition. — Dicrocoeliidae with lancet- 

 shaped bodies, without spines, and with 

 suckers placed close together. Intestine 

 does not reach the posterior end. Genital 

 pore close behind the pharynx, with a 

 cirrus pouch in front of the ventral 

 sucker, just behind which the testes lie 

 with the ovary in the median line 

 behind them. The uterus lies behind 

 the ovary and testes, extending as far back as the posterior 

 border. The yolk glands are small, and situated in the middle 

 quarter of the lateral areas of the body. The excretory vesicle 

 is tubular. Ova dark brown. Worms live in the liver and gall- 

 bladder, rarely in the intestine. 

 Type Species. — Dicroccelium dendriticum Rudolphi, 1819. 



DieroccBlium dendriticum Rudolphi, 1819. 



Synonyms. — Fasciola lanceolata Rudolphi, 1803, nec Schrank, 

 1790 ; Distomum lanceolatum Mehlis, 1825 ; Dicroccelium lanceolatum 

 Dujardin, 1845; Dicroccelium lanceatum Stiles and Hassall, 1896. 



Fig. 225. — Dicrocoslium 

 dendriticum Rudolphi. 



(After Looss, from Mense's 

 ' Tropenkrankheiten.') 



a, SchematicX6; b, natural 

 size; c, eggs X 250. 



