DE. T. S. COBBOLD's ST>'0PSTS OF THE DISTOMIB^. 11 



tode. The last-named is shorter, also broader, and oval ; it exists 

 abundantly in different parts of the bodies of several Brazilian fresh- 

 water fishes, and assumes its adult specific characters only when trans- 

 ferred into the alimentary canal of marsh-frequenting birds. Thus 

 Natterer found the younger form in such fishes as Carapus brachyurus, 

 Hydrolinus scomber oides, Geophagus Pappaterra, Chcetobranchus 

 flavescens, Crenicichla Johanna, and C. lepidota ; and in the following 

 birds, Ardea Cocoi, Ciconia americana, and C. mycteria. 



12. DisTOMA Globulus, Rudolphi. 



D. Globulus, Rudolphi, Dujardin, Creplin, Bellingham, Diesing, Revis. 



p. 37. 

 Hab. This species has been found in Anas fuUyula by Rudolphi ; also 



in the intestines of ^. ///acta^js, A. acuta, and Mergus merganser ; iu 



Alca torda, by Creplin. 



13. DisTOMA LuciPETUM, Rudolphi. 



X). lucipetum, Rudolphi, Bremser, Dujardin, Diesing. 

 Hab. Found by Bremser beneath the nictitating membrane of the eye 

 of Larus glaucus and L.fuscus, in April and May. 



14. DiSTOMA HOLOSTOMUM, Rudolphi. 



D. holostomum, Rudolphi, Dujardin, Diesing. 

 D. Ralli, Rudolphi. 



Hab. Recorded by Bremser in the intestines of Rallus aquaticus, and 

 found by Siebold in the Spotted Crake {Crex pozana). 



15. DiSTOMA FUSCATUM, Rudolphi. 

 D.fuscatum, Rudolphi, Dujardin, Diesing. 



Hab. Discovered by Rudolphi in the intestine of Tetrao Coturnix. 



16. DiSTOMA coNCAVUM, Creplin. 



D. concavum, Creplin, Dujardin, Diesing, i. p. 340. 



Hab. Found by Creplin and Schilling in the caecum and rectum of 

 Colymbus rufogularis, in November ; in Podiceps cristatus byMehlis ; 

 in the caeca and small intestine of Anas Hornschuchii, in May, and 

 in A. clangula, by Creplin; in A. glacialis, A. marila, A. fusca, by 

 Schilling ; in Mergus serrator and M. merganser by Mehlis ; in the 

 intestines of Alca torda by Creplin. 



17. DiSTOMA Lingua, Creplin. 

 D. Lingua, Creplin, Diesing. 



Hab. Infests Larus maximus and L. marinus, according to Creplin, in 

 November ; also found by Mehlis in L. argenteus. 



18. DiSTOMA MACROURUM, Rudolphi. 

 D. macrourum, Rudolphi, Creplin, Diesing. 

 D. longicauda, Rudolphi. 



D. attenuatum, Dujardin. 



Hab. Found by Jurine and Bremser iu Corvus Comix; by Mehlis in 



