68 Ronald W. Mobley and Grover C. Miller 



Roberts, B. 1940. The life cycle of Wilson's Petrel. British Graham Land 



Exped., Sci. Rep. 7:141-194. 

 Robertson, W. B., Jr. 1964. The terns of the Dry Tortugas. Bull. Fla. State 



Mus. Biol. Sci. 5:1-14. 

 Spatlich, Walter. 1909. Untersuchungen uber Tetrabothrien. Ein Beitrag zur 



Kenntnis des Cestoden-korpers. Zool. Jahrb. Anat. 25:539-594. 

 Szpotanska, I. 1925. Etude sur les Tetrabothriides des Procellariiformes. Bull. 



Acad. Pol. Sci. Lt. Ser. B.:673-727. 

 1929. Recherches sur quelques Tetrabothriides d Oiseaux. Bull. 



Acad. Pol. Sci. Lt. Ser. B.: 129-152. 

 Threlfall, William. 1971. Helminth parasites of alcids in the northwestern North 



Atlantic. Can. J. Zool. 49(4):46 1-466. 

 Tseng, S. 1932. Studies on avian cestodes from China. Part I. Cestodes from 



Charadriiform birds. Parasitol. 24:87-106. 

 1933. Studies on avian cestodes from China. Part II. Cestodes from 



Charadriiform birds. Parasitol. 24:500-511. 

 Van Cleave, Harley J. 1918. The Acanthocephala of North American birds. 



Trans. Am. Microsc. Soc. 37:19-47. 

 1934. Observations on the status of certain genera of Acanthoce- 

 phala, chiefly from birds. J. Parasitol. 20:324. 

 1939. A new species of acanthocephalan genus Polymorphus and 



notes on the status of the name Profilicollis. J. Parasitol. 25:121-131. 

 1947. Analysis of distinction between the acanthocephalan genera 



Fillicollis and Polymorphus with descriptions of a new species of Polymor- 

 phus. Trans. Am. Microsc. Soc. 6(5:302-313. 



Wardle, R. A., and J. A. McLeod. 1952. The Zoology of Tapeworms. Univ. 

 Minn. Press, Minneapolis. 780 pp. 



Wardle, R. A., J. A. McLeod and S. Radinovsky. 1974. Advances in the Zool- 

 ogy of Tapeworms, 1950-1970. Univ. Minn. Press, Minneapolis. 274 pp. 



Watson, George E. 1966. Seabirds of the Tropical Atlantic Ocean. Smithsonian 

 Identification Manual. Smithsonian Press, Washington. 120 pp. 



1975. Birds of the Antarctic and Sub-Antarctic. Am. Geophy. 



Union, Washington. 350 pp. 



Williams, I. C, and C. Ellis. 1974. The helminth parasites of the sheathbill, 

 Chionis alba (Gmelin), and the diving petrels, Pelecanoides georgicus 

 (Murphy and Harper) and P. urinatrix (Gmelin), at Bird Island, South 

 Georgia. J. Helminthol. 48(3): 195-197. 



Yamaguti, Satyu. 1935. Studies on the helminth fauna of Japan. Part VI. Ces- 

 todes of birds I. Jpn. J. Zool. 6:184-232. 



1959. Systema Helminthum. Vol. II. Cestodes of Vertebrates. 



Interscience Publ., New York. 860 pp. 



1961. Systema Helminthum. Vol. III. The Nematodes of Vertebrates. 



Interscience Publ., New York. 1261 pp. 



1963. Systema Helminthum. Vol. V. Acanthocephala. Interscience 



Publ., New York. 423 pp. 



1971. Synopsis of Digenetic Trematodes of Vertebrates. Keigaku 



Publ. Co., Tokyo. 1074 pp. 



Accepted 29 January 1982 



