PARASITES 113 



Within the alimentary tube have been found 

 species of Trichomonas and Caryospora. 



Bacteria. — Acid-fast bacilli have been described 

 in tubercular lesions found in snakes by Sibley, 

 Gibbs and Shurley, Shattock, Hausemann, and 

 Sambon. 



The so-called " canker," which so frequently 

 develops in the oral cavity of captive snakes, is also 

 a bacterial disease, due to a specific bacterium of 

 thick, rod-shaped form. 



LIST OF PARASITES HITHERTO 

 RECORDED FROM EUROPEAN SNAKES 



TROPIDONOTUS NATRIX, L. 

 ACANTHOCEPHALA. 



Echinorhynchus incequalis, Rudolphi. 



Echinorhynchus poly acanthus, Creplin. 

 Nematoda. 



Strongylus auricularis, Zeder. 



Strongylus catanensis, Rizzo. 



Trichosoma mingazzini, Rizzo. 



Oxysoma brevicaudatum, Zeder. 



Nematoxys commutatus, Rudolphi. 



Ascaris cephaloptera, Rudolphi. 

 Trematoda. 



Opistorchis caudatum, Polonio. 



Dicroccelium assida, Dujardin. 



Diplodiscus conicum, Polonio. 



Tetracotyle colubri, v. Lin stow. 

 8 



