186 



PLATHELMINTHES 



lum often minute; ovary and testes back of acetabulum; large recep- 

 taculum seminis present; uterus usually in longitudinal folds: in lungs 

 of amphibians; 8 species. 



P. similiplexus (Stafford) (Fig. 304). Length 8 mm.; width 2 mm.; 

 body spinose; testes small; uterus very voluminous and dark-colored; 

 in the lungs of frogs and toads. 



10. Cephalogonimus Poirier. Body broad, 

 spinose; acetabulum near center of body; yolk 

 glands; genital pore in front of oral sucker; 

 excretory vesicle extensively branched; ovary just 

 back of acetabulum and testes back of it: in 

 turtles. 



C. vesicaudus Nickerson. Body elliptical, 2 mm. 

 long: in intestine of soft-shell turtles in Minnesota. 



11. GoRGODERiNA Looss. Body elongate and 

 without spines; acetabulum large and in forward 

 half of body; back of it are the j^olk glands, which 

 are a pair of compact bodies; the ovary is back of 

 these; testes 2 in number; uterus fills the hinder 

 half of the body: 4 species, in urinary bladder of 

 frogs and toads. 



G. translucida (Stafford) (Fig. 

 widest in the middle and tapering to 

 both ends; 9.5 mm. long and 1.2 mm. 

 wide: in the toad and the spring 

 frog. 



12. GoRGODERA Looss. Like Gorgoderina, but with 

 9 testes in 2 rows in the hinder half of the body: 2 

 species. 



G. amplicava Looss. Body widest in middle ; acetabu- 

 lum very large; length 3.75 mm., and .75 mm. wide: in 

 the urinary bladder of the bullfrog. 



13. Microphallus Ward. Body broad with blunt 

 ends; intestinal coeca very short and not reaching acetabu- 



lum; yolk glands lobate, in hinder part of body; genital 



Pig. 304 



PneumoncBces 



similiplexus 



(Stafford). 



References as in 



Fig. 293. 



305). Body 



pore at left of acetabulum: in fresh-water fish. 



M. opacus (Ward) (Fig. 306). Length 1.7 mm.; 

 width 1 mm.; oesophagus veiy long: in intestine of Amia 

 calva; intermediate host Camharus propinquus. 



14. Halipegus Looss. Body elongate; acetabulum in middle of 

 body; yolk glands 2 compact lobate bodies near hinder end; ovary in 

 front of them and testes in front of ovary: in amphibians. 



Fig. 305 



Oorgodorina 



tratislucida 



(Stafford). 



References 



as in Fig. 293. 



