PARASITIC FLATWORMS 



399 



Body elongate, lanceolate without conspicuous well marked anterior 

 and posterior regions 112 



Testes subdivided, forming on one side a series of four and on the 

 other five parts; in all nine separate lobes. 



Gorgodera Looss 1899. 



Testis on ovarian side has five parts; the opposite testis lies further an- 

 teriad and is divided into four parts only. In well-developed adults these 

 organs are completely concealed by the coils of the uterus filled with dark 

 brown, almost black eggs. 



Found in the bladder of various Amphibia: Rana and Salamandra (?). 

 At least two species in North America. 



Representative American species. 



Gorgodera minima Cort i9r2. 



Fig. 690. Gorgodera mimma. Ventral view. Young specimen with but few 

 eggs. X 72. (After Cort.) 



113 (112) Two simple testes, elongate-oval, not divided. 



Gorgoderina Looss 1902. 



Testes are elongate and have irregular notched margins but do not divide into sections. 

 Vitellaria have only few lobes. Much like the former genus. Adults are difficult to distinguish 

 after the uterine coils cover the testes. 



Found in the bladder of Amphibia: Bujo, Rana and Salamandra (?). Three species known 

 from North America. 



Representative American species. 



Gargoderina attenuaia Stafford 1902. 



114 ./in) 



Fig. 691. Gogoderina attenuaia. Ventral view. X 24. (After Cort.) 



Body elongate; slender anterior region distinct from broad poste- 

 rior region Phyllodisiomum M. Braun 1899. 



No sharp Une of division marks the transition between the two regions 

 of the body. The vitellaria are sohd masses only shghtly indented 

 marginally. The testes are oblique, well separated from each other, 

 and only weakly lobed if at all. 



In urinary bladder of fishes and amphibians. 



Representative American species. 



Phyllodistomum americanum Osborn 1903. 



One species (P. americanum Osborn) reported from North America 

 in Amhlysioma; two others doubtful from pike {Esox lucius), bull-head 

 {Ameiurus nebulosus), and perch (Perca flawscens) in Canada. 



Fig. 692. Phyllodistomum americanum. Ventral view. X i6. (After 

 Osborn.) 



US (no) Vitellaria composed of distinctly separated follicles 116 



