72 



PLATYHELMINTHES TREMATODA 



en 



.. 



Species. Final host. 



Rud. \ Kana 



D. cygnoides Zed. Rana . 

 D.ajUndraceum t Rwm _ 



D. dimorphum ( Ardea, Ciconia 

 I (Bri 



Host into which the 

 larva enters, and in 

 which Cercariae are 

 eventually formed. 



f Limnaea ovata ( 

 \ Planorbis comeus \ 



Host into which the Cercaria 

 migrate and encyst ; eaten b; 

 final host. 



Not known 



. .,. -, ( Limnaea sp. (Cercaria macro 

 Pisidium, Cyclas j cerm ^ 



Dies. 



razil) 



D. echinatum Zed. \ '^J?' ' 



D. endolobum~D\\]. Rana . 



Limnaea ovata 



Not known 



Species of Lim- 

 naea 



Limnaea stagnalis 



D. globiporum 

 Rud. 



D. hepaticum 

 Abild. 



D. hystrix Duj. 



D. macrostomum 



Rud. 

 D. militare y. Ben, 



D. nodulosum Zed. 



D. ovocaudatum 

 Yulp. 



D. retusum Duj. 



D. squamula Dies. 



D. signatum Duj. 



D. 



lum Rud. 



Gasterostomum sp. 



Perca Jluviatilis . Not known 



/ Sheep, Oxen, Man, 

 t etc. 



j Lophius pisca- 

 \ tortus 

 j Warblers, Tits, 

 \ Woodpeckers, etc. 

 Common Snipe 



Perca Jluviatilis 

 Plana esculenta 



Rana 



Polecat 

 j Tropidonotus na- 

 \ trix 



-j Badger, Polecat . 

 Dogfish, Rays 



G. fimbriatum f n v 



v. Sieb. \Perca,Esox 



G. gracilescens j Lophius pisca- 



Rud. \ torius 



Limnaea trunca- 

 tula 



-J Not known 



\ Succinea putris 



Pa ludina vivipara 

 f Bithynia tentacu- 

 \ lata 



J Species of Plan- 

 \ orbis 



Limnaea stagnalis - 



Unknown 



-J Unknown 



Paludina vivipara 



( Ostrca cdulis, Car- 

 -J dium rusticum, 

 \ C. edule 

 I Unio, Anodonta 

 I (Cercaria known 



\as Bucephalus ' 

 polymorphus) 



Llybius fuliginosus 



Different species of Fishes 



Species of Limnaea, Paludin 



vivipara 

 L. stagnalis, Gammarus pulca 



larvae of Limnophilu 



rhombicus 

 'Limnaea stagnalis, L. ovata 



Succinea pfeifferi, S. putris 



Physa fon'tinalis, Planorbi 

 w marginatus 



Omitted 



Marine Fishes 



Omitted 



P. vivipara 



Cyprinus, Acerina cernua 



Probably omitted. (Cercaria 



known as C. cystophora Wag.) 



L. stagnalis, larvae of Phry 



ganeidae 

 Rana temporaria 



Rana 



Unknown 



Leuciscus erythrophthalmus 



Unknown 



/Species of Gadus (e.g. G. 

 y aeglejinus), Molva, Lophius 



Monostomum 

 fiavum Mehl. 



Anas . 



Planorbis comeus Omitted 



Classification of Trematodes. We have seen (p. 63) that it 

 is hardly possible to carry out fully the division of Trematodes into 

 Monogenea and Digenea. Nevertheless, pending further inves- 

 tigation on the doubtful points, this classification may still be 





