46 DR. T. s. cobbold's synopsis of the distomid^. 



Hab. Found by Hiibner in Ardea alba ; by Bellingham in Larus argen- 

 tatus; it likewise infests L. canus and L. ridibundus, and Ardea 

 stellar is. 



12. HoLOSTOMA GRACiLE, Dujai'din. 

 H. gracile, Dujardin, Creplin, Diesing. 



AmpUstoma gracile, Rudolpbi, Westrumb, Creplin, Bellingham. 



Hab. Found by Mehlis in Anas Clungula, A. fusca, and A. albifrons ; by 

 Creplin in A. nigra ; by Bellingham in Colymbus glacialis ; by Schilling 

 in Mergus Serrator ; it also infests M. Merganser and M. albellus. 



13. HoLOSTOMA ERRATicuM, Dujardin. 



H. err a^/cwm, Dujardin, Creplin; Diesing, Revis. p. 16. 



H. macrocephalum, Creplin (ex parte). 



Amphistoma erraticum, Rudolphi, Westrumb. 



A. isostomum, Rudolphi, Dujardin, Bellingham. 



A.Anatis TadorncB, Rudolphi. 



Strigia Anatis Tadornce, Viborg. 



S. Candida, Abildgaard. 



Hab. Found by CrepUn in Anas ferina ; by Bellingham in A. Boschas 

 /era ; it also infests ^. Cygnus, A. Clangula, A. Marita, A. glacialis, A. 

 Tadorna, A. fusca, A. mollissima ; by Creplin in Alca Pica, A. Torda, 

 and Colymbus balticus; by Rudolphi in C. septentrionalis ; by Brem- 

 ser in C. arcticus, and Scolopax rusticola ; by Rudolphi in S. Galli- 

 nago ; it also occurs in Mergus albellus and Vanellus cristatus. 



14. HoLOSTOMA PLATYCEPHALUM, Dujardiu. 

 H. platycephalum, Dujardin, Diesing. 

 Amphistoma platycephalum., Creplin. 



Hab. Found by Schilling and Creplin in Colymbus rufo-gularis and 

 Larus argentatus ; by the latter also in L. ridibundus and Podiceps 

 cristatus ; by Schilling and Siebold in L. fuscus, and also by the 

 latter in L. canus and Carbo cormoranus. It usually occupies the bursa 

 of Fabricius. 



15. HoLOSTOMA VARIEGATUM, Dujardin. 

 H. variegatum, Dujardin, Diesing. 

 Amphistoma variegatum, Dujardin. 



Hab. Found by Schilling in Larus argentatus, L. Marinus, L. maximus, 

 and Alca Torda; by Creplin in Uria troile. 



16. HoLOSTOMA piLEATUM, Dujardin. 

 Holostoma pileatum, Dujardin, Creplin, Diesing. 

 Amphistoma pileatum, Westrumb, Rudolphi. 

 Monostoma pileatum, Zeder, Rudolphi. 

 Fasciola pileata, Rudolphi. 



Hab. Found by Rudolphi in Sterna Hirundo ; by Creplin in S. macroura ; 

 by Bremser in S. cantiaca. 



17. HoLOSTOMA MULTILOBUM, Cobbold. 



