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1901. Revision einiger Arten neue Gattung von Vogeldistomen. Ctbl. Bakt., Abt. I., 



28: 12-23. 

 1905. Die trematoden des arktischen Gebietes. Fauna Arctica (Jena), 2: 291-372. 

 Oguri, M. and G. W. T. C. Chu. 



1955. Influence of diet on the susceptibility of domesticated ducks to parasitism by 

 a marine trematode. (Abstract) Hawaiian Acad. Sci. (30th Ann. Meeting), 

 pp. 15-16. 

 Oliver, L. 



1938. A new trematode Allassogonoporiis viarg'malis from the muskrat. J. Parasit., 

 24: 155-160. 

 Olsen, O. W. 



1937. A systematic study of the trematode subfamily Plagiorchiinae Pratt, 1902. 

 Trans. Amer. Mich. Soc, 56: 311-339. 



1938. Parasite studies on ring-necked pheasants Phasianus colchicus torqtiahis 

 (Gmelin) in Minnesota. J. Parasit., 24(6, sect. 2) : 24-25. 



Olsson, P. 



1868. Entozoa iakttagna hos Skandinaviska hafsfiskar. Lunds Univ. Arsskrift 4, 



64 pp. 

 1876. Bidrag till Skandinaviens Helminthfauna. I. Kongl. Svenska \'etensk. Akad. 



Handl. Stockholm, 14(1): 1-35. 

 1893. Bidrag till Skandinaviens Helminthfauna. H. Kongl. Svenska Vetensk. Akad. 

 Handl. Stockholm, 25: 1-41. 

 Oregon State College Agrlc. Expt. Sta. 

 Directors report Oct. 1926, pp. 51, 52. 

 Sept. 1928, p. 61. 

 Ozaki, Y. 



1924. [Studies on the gasterostome trematodes with description of three new genera 

 (Preliminary Report) ]. (Japanese text). Dobutsu Zasshi, Tokvo (426) Apr. 15, 

 36: 173-201. 

 1928. Some gasterostomatous trematodes of Japan. Jap. J. Zool., 2: 35-60. 

 Palombi, A. 



1934. Gli stadi larvali dei trematodi del Golfo di Napoli. I. Contributo alio studio 

 dello morfologia, biologia e sistematica della cercariae marine. Publ. Staz. Zool. 

 Napoli, 14: 51-94. 

 Pande, B. P. 



1937. On the morphology and systematic position of a new bladder fluke from an 

 India frog. Ann. Mag. Nat. Hist., 20: 250-256. 

 Park, J. T. 



1936. Two new trematodes, Sterrlmrus magnatestis and Tubiilovesiciila californica 

 (Hemiuridae) from littoral fishes at Dillon's Beach, California. Trans. Amer. 

 Micr. Soc, 55: 477-482. 

 Parker, M. V. 



1941. The trematode parasites from a collection of amphibians and reptiles. J. 

 Tenn. Acad. Sci., 16 {\) : 27-44. 

 Patten, J. A. 



1952. The life cycle of Conspicuum icteridorum Denton et Byrd, 1951 (Trematoda: 

 Dicrocoeliidae). J. Parasit., 38: 165-182. Also in Anat. Rec, 111: 583-584 

 (1951). 

 Pearse, A. S. 



1924a. Observations on parasitic worms from Wisconsin fislies. Trans. Wis. Acad. 



Sci. Arts and Letters, 21: 145-160. 

 1924b. Parasites of lake fishes. Trans. Wis. Acad. Sci. Arts and Letters, 21: 

 160-194. 



