374 University of California Publications in Zoology [Vol. 19 



Luhe, M. 



1009. Parasitische Plattwiirmer, I. Trematodes. Die Siisswasserfauna 

 Deutschlands, 17, 1-217. 



McAtee, W. L. 



1918. Food habits of the mallard ducks of the United States. U. S. Dept. 

 of Agr. Bull. No. 720, 1-35. 



Nakagawa, K. 



1917. Human pulmonary distomiasis caused by Paragonimus westermanni. 

 Jour. Exp. Med., 26, 297-323, 10 pis. 



NlCOLL, W. 



1906. Notes on trematode parasites of the cockle Cardium edule and mussel 



Mytilus edulis. Ann. Mag. Nat. Hist. (7), 17. 

 1906a. Some new and little known trematodes. Ibid., p. 513. 



O'Roke, E. C. 



1917. Larval trematodes from Kansas fresh-water snails. Whole Series, 20, 

 No. 7, 161-180, 7 pis. 



Ssinitzin, D. T. 



1911. The parthenogenetic generation of trematodes and their progeny in 

 the mollusks of the Black Sea. Mem. Acad. Sci. Petrograd (8), 30, 

 1-127, 6 pis. Russian. 



