157] COMPARATIVE STUDIES ON NEMATODES— EETHERINGTON 53 



Shipley, A. E. 



1910. Nemathelminthes. Cambridge Nat. Hist., 2:123-185. 

 Steinzr, G. 



1919. Untersuchungen iiber den allgemeinen Bauplan des NematodenkSrpers. Zool. 

 Jahrb., Anat., 43:1-96; 3 Taf. 



1921. Beitrage sur Kenntnis mariner Nematoden. Zool. Jahrb., Anat., 44:1-68; 4 Taf. 



1921a. Ost-asiatische marine Nematoden. Zool. Jahrb., Anat., 44:195-226; 3 Taf. 

 Stossich, M. 



1889. II Genere Physaloptera Rudolphi. Boll. See. adriat. sci. nat. Trieste, 11:1-24, 

 3 Tav. 



1890. II Genera Trichosoma Rudolphi. Boll. Soc. adriat. sci. nat. Trieste, 12:3-38. 



1891. II Genera Dispharagus Dujardin. Boll. Soc. adriat. sci. nat. Trieste, 13:1-28; 3 

 tav., 27 figs. 



1896. II Genere Ascaris Linn6. Boll. Soc. adriat. sci. nat. Trieste, 17:1-114. 



1897. Filaire e Spiroptere. Boll. Soc. adriat. sci. nat. Trieste, 18:13-162. 

 1899. Strongylidae. Boll. Soc. adriat. sci. nat. Trieste, 19:55-152. 



Travassos, L. 



1921. Contribuicoes para o conhecimento da fauna helmintholojica brasileira. Ensaio 

 monographico da familia Trichostrongylidae Leiper, 1909. Mem. Inst. Oswaldo 

 Cruz, 13:5-135; 56 pi. 



Ward, H. B. 



1916. Nematoda, Ref. Handbook Med. Sd., Ed. 3., 6:676-704. 



1917. On the Structure and Classification of North American Parasitic Worms. Joum. 

 Parasit., 4:1-12; 1 pi. 



Ward, H. B. and Magath, T. B. 



1916. Notes on Some Nematodes from Fresh-Water Fishes. Jour. Parasit, 3:57-64; 1 pi. 

 Ward, H. B. and Whipple, G. C. 



1918. Fresh-Water Biology. New York, 1111 pp., 1547 figs. 

 Washburn, E. W. 



1921. Principles of Physical Chemistry. New York, 511 pp. 

 Willows, R. S. and Hatschek, E. 



1915. Surface Tension and Surface Energy. Phila. 80 pp. 



