156 



THE ANIMAL PARASITES OF MAN 



case of a man aged 35, in whose right hypochondriac region a 

 tumour the size of a pigeon's egg had formed, and from which a 

 young liver fluke was extracted. 



After such experiences it is not improbable that Distomum oculi 

 humani, Ammon, 1833, as well as Monostomum lentis, v. Nordm., 

 1832, may have been very young hepatic flukes that had strayed. 

 Ammon found four specimens (length 0.5-1 mm.) of his species 

 (termed Distomum ophthalmobium by Diesing in 1850) between the 

 opaque lens and the capsule of a five-months'-old child . in Dresden, 

 and von Nordmann discovered the Monostomum lentis to the number 

 of eight specimens (only 0*3 mm. in length) in the opaque lens of 

 an old woman, 1 The fact that Ammon found that the intestinal caeca 



FIG. 88. Young Fasciola hepatica, soon 

 after travelling into the liver : the intestinal 

 forks carry lateral blind ducts (magnified). 

 (From Leuckart.) 



FIG. 89. Fasciola hepatica var. 

 angusta, Raill. (natural size). (After 

 Stiles and Hassall.) 



of the worm discovered by him had no lateral branches does not 

 oppose the above opinion, as in the liver fluke the intestinal caeca 

 are originally unbranched, and according to Lutz they only later 

 develop lateral ramifications between the twelfth and twenty-second 

 day of the infection (fig. 88). 



2. Fasciola hepatica var. angusta, Raill., 1895. 



Under this name Raillet 2 describes elongated and slender flukes 

 which occur in the bile ducts of oxen slaughtered at Saint Louis 



1 Gescheidt and Ammon, " Die Entoz. d. Auges" (Ztsch. f. Ophth., 1833, iii., p. 405); 

 Ammon, Darst. d. Krankh. d. menschl. Aug. Dresd., 1838); Nordmann, A. v., 

 Mikrogr. Beitr. z. Naturg. d. wirbellos. Thiere., Berlin, 1832, part ii., p. ix. 



- Railliet, A., " Sur une form, part de douve 

 Paris, 1895 [10], ii., p. 388). 



>. prov. du Senegal " (C. R. soc. biol., 



