IXTHSTINAL SCHISTOSOMIASIS 



259 



Order (3) Cyclophyllidea. The scolex has four suckers and tlie 

 anterior end in a rosteUum with or without hooks. The 

 segmentation is distinct. There is no uterine orifice. 

 The eggs are without lids. 



Order (4) Diphyllidea. These are very rarely parasitic in man. 



Order (5) Trvpanorhyncea. Not parasitic in man. 



The sub-families, genera and species of Orders (i) and (3) found in 

 man are given in the following table. 



Order and 

 family 



S:2 



>> n. 



a. " 



0.2 



u) o 



'-a 



o K 



Stib-family 



Dibothriocephalinx 



Ligulinae ... 

 Dipylidiinee 



IlymenoIepiniriEe 

 Davaineince 



Genus and sub-geniis 

 Dibothriocephalus 

 Diplogonoporus 

 Sparganutn 



Treniinae 



Braunia ... 

 Dipylidium 



Hymenolepis 

 Davainea 



/ Tajnia' .. 



Echinococcus 



j Hymenolepis 



Drepanido- 

 l£enia(?) ... 



{ Ta-nia 



Tasniorhynchus 



MAN IS THE HOST FOR :— 



T. solium, saginata, africana, hominis, philippina, confusca and 

 also T. bremneri. 



Dibothriocephalus parvus and Hymenolepis nana. 



Davainea madagascariensis and asiatica. 



Rarely Dibothriocephalus latus which is usually in the dog. 



Rarely Dibothriocephalus cordatus which is usually in the seal and 



walrus. 



Rarelv Hymenolepis diminuta which is usually in the rat and 



mouse. 



Rarelv Drepanidot^enia lanceolata which is usually in ducks and 



geese. 



CYSTS MAY DEVELOP IN MAN FROM :— 



T. solium. 



Echinococcus granulosus and multilocularis. 



Larval forms of Sparganum. 



? Cysticercus of T. saginata. 



