EXCRETORY SYSTEM IN DIGENEA. 321 



Looss, A. 



'92 Recherches, sur la Faune Parasitaire de 1'Egypte, prem. partie. Mem. 



Inst. Egypt., 3, 1-252, 15 pi. 

 Wright, Sewall 



'12 Notes on the Anatomy of the Trematode, Microphallus Opacus. Trans. 

 Am. Micr. Soc., 31, 167-175, 2 pi. 



