5^4 



TREMATODA 



a larger disc, on the hinder border of which lies the acetabulum. The rest of 

 the body is thin, tapering to the mouth. The genital pore is at a level with 

 the bifurcation of the intestine. The testes are double, with a sinuous vas 

 deferens. The uterus and the yolk glands are situated laterally. The eggs 

 are oval, 0-15 millimetre in length and 0-072 millimetre in breadth. 



Pathogenicity.- — It is not knov/n whether these parasites cause 

 any disease. It occurs in 5% of the pigs in French Indo-China. 



Super-Family Fascioloidea Stiles and Goldberger, 1910. 

 Synonym,— Distomata Retzius, 1782. 



Definition. — Prostomata with acetabulum ventral and always 

 separated from the posterior extremity by some part of the genital 

 apparatus. Oral sucker present; caeca two in number. Hermaphro- 

 dites or with separate sexes. 



Type Family. — Fasciolidce Railliet, 1895. 



Classification. — The super- famity may be classified into the follow- 

 ing families as follows :■ — • " 



A. Hermaphrodites : — 



I. Oral sucker without collar of strong pointed spines:— 



[a) Ovary in front of testes:— 



1. Genital pore in front of ventral sucker— FasciolidcB . 



2. Genital pore not in front of ventral sucker:— 



(a) Genital pore surrounded by a pseudo-sucker — 



HeterophyiidcB. 



(b) Genital pore not so surrounded:- — ■ 



(c) Cuticle with pointed spines — Troglo- 



tremidcB. 



(d) Cuticle without pointed spines — Opis- 



thorchiidce. 



(b) Ovary behind testes— DicrocceliidcB . 



11. Oral sucker with a dorsal and lateral, but not ventral, 

 fold or collar bearing pointed spines- — Echinostomidce. 



B. Sexes separate — Schistosomidce. 



FAMILY FASCIOLID^ Railliet, 1895. 



Definition. — ^Fascioloidea, hermaphrodites with oral sucker with- 

 out spiny collar, with ovary in front of the testes and genital pore 

 behind the ventral sucker. Vitellaria well developed, extending 

 dorsally and ventrally. Cirrus and vagina without spines. Uterus 

 poorly developed Excretory vesicle much branched Eggs large. 



Classification. — ^The Fasciolidse are divided into two subfamilies 

 as follows : — 



A . Body with shoulder ; receptaculum seminis absent ; intestine 



branched — Fasciolince . 



B. Body without shoulder; receptaculum seminis present; 



intestine not branched- — Fasciolop since. 



