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PROCEEDINGS OF THE NATIONAL MUSEUM 



four transverse loops of uterus. Seminal receptacle small, globular, 

 situated entirely posterior to ovary. Mehlis' gland diffuse, located 



Figure 35. — a, Adult Lyperosomum oszvaldoi_^{TTAva.ssos, 1919) from the gall bladder of 

 Toxosioma rufum, ventral view; b, optical sagittal section of anterior end of Lyperosomum 

 oswaldoi from Toxosioma rufum, showing position and lumen of acetabulum; c, very 

 young specimen of Lyperosomum oswaldoi removed from the gall bladder of Toxosioma 

 rufum, showing similarity in shape and arrangement of organs to that of adult; d, Brachy- 

 lecithum rarum (Travassos, 1917) from the liver of Pipilo erythrophthalmus, ventral view; 

 e, lateral view of anterior end of Brachylecithum rarum from Pipilo erythrophthalmus, show- 

 ing position of suckers and protruding center of acetabulum; f, Brachylecithum tubercula- 

 tum, new species, from the liver of Wilsonia canadensis, ventral view; g, h, lateral views of 

 anterior ends of Brachylecithum tuberculatum from Wilsonia canadensis , showing acetabulum 

 with shallow lumen and with center protruded. 



