ART. 17 PARASITES OF AMPHIBIA AND EEPTILIA HAEWOOD 71 



Walton, A. C. — Continued. 



1929. Studies on some nematodes of North American frogs. Journ. Parasit., 



vol. 15, pp. 227-241. 

 Ward, H. B. 



1917. On the structure and classification of North American parasitic 



worms. Journ. Parasitol., vol. 4, pp. 1-11. 

 WiLKIE, J. S. 



1930. Some parasitic nematodes from Japanese Amphibia. Ann. Mag. Nat 



Hist., ser. 10, vol. 6, pp. 606-614. 

 W00DL.\KD, W. N. F. 



1925. On three new proteocephalids (Cestoda) and a revision of the genera 

 of the family. Parasitology, vol. 17, pp. 370-3^. 



U.S. GOVERNMENT PRINTING OFFICE; 1932 



