know about the nature of the further development up to the time of 



maturity. At the present time, literary data concerning the development 

 of 13 genera and 22 species are known to us, ^ namely: 1) Acolpenteron 



1 ~~~ 



References to authors who conducted experiments are reproduced in the 

 appendix (pages 138 to 216 ). Data fronn the published works of our labo- 

 ratory are not included in the present list. 



catostomi Fischthal and Allison, 2) Dactylogyrus vastator Nybelin, 3) D, 

 anchoratus (Dujardin), 4) D. crassus Kulwiec, 5) D. formosus, Kulwiec, 

 6) D. wegeneri Kulwiec, 7) D. macracanthus Wegener, 8) Ancylodiscoides 

 vistulensis Siwak, 9) Benedenia melleni (MacCallum), 10) Polystoma 

 integerrimum Froelich, 11) Polystoma nearcticum (Paul), 12) Polystomo- 

 ides oris Paul, 13) Diplorchis ranae Ozaki, 14) D. scaphiopi Rodgers, 

 15) Sphyranura oligorchis Alvey, 16) Octostoma scombrii Beneden and 

 Hesse, 17) Diclidophora luscae (Beneden and Hesse), 18) D. poUachii 

 (Beneden and Hesse), 19) Diplozoon paradoxum Nordmann, 20) Microcotyle 

 spinicirrus MacCallum, 21) M. donavini Beneden and Hesse, 

 22) Diplasiocotyle johnstoni Sanders. 



From 1928 to the present time, 24 genera and 62 species were 

 studied for the first time and checked for the verification of the data of 

 previous researchers by us and by our collaborators. ^ 



Those which were studied by us personally are noted by asterisks. 



*1. Dactylogyrus vastator Nybelin 17. 



*2. D. anchoratus (Dujardin) 18. 



*3. D. solidus Achmerow 19. 



*4. D. formosus Kulwiec 20. 



*5. K. wegeneri Kulwiec 21. 



*6. D. intermedius Wegener 22. 



*7. D. cornu (Linstow) *23. 



*8. D^ fallax Wegener *24. 



*9. D. crucifer Wagener 



*10. D. longipula Bychowsky *25. 



*11._D. varicorhini Bychowsky *26. 



*12, D. pulcher Bychowsky 



*13. D. modestus Bychowsky 27. 



14. D. curvicirrus Achmerow 28. 



15. D. gussevi Achmerow 



16. D. phoxini Malewizkaja 29. 



D. erythroculteris Gussew 

 D. achmerowianus Gussew 

 D. obscurus Gussew 

 D. contortus Gussew 

 D, leucisculus Gussew 

 D. peltatus Gussew 

 Dogielius planus Bychowsky 

 Ancyrocephalus paradoxus 



Creplin 

 A, (s. la£. ) cruciatus (Wedl). 

 A. (s. lat. ) vanbenedeni 

 (Parona and Perugia) 

 A. (s. lat. ) pavlovskyi Gussew 

 A. (s. lat . ) morgurndae 



Yannaguti 

 A. (s. lat. ) curtus Gussew 



95 



