TREMATODES 



185 



I 



S. casus Linton (Fig. 301). Number of spines 36, 18 in each row; 

 body 6 mm. long ; 1 mm. wide : in rectum of the gray snapper. 



5. AMPHIMERTTS* Barker. Body lanceolate; acetabulum in forward 

 half with the genital pore in front of it; ovary near the center of the 

 body; yolk glands divided into two regions; testes, which 



may be lobate, in a row behind it with the excretory 

 vesicle winding between them: several species, in land 

 vertebrates. 



A. pseudofelineus (Ward) (Fig. 302). Body not 

 spinose; length 10 to 21 mm.; width 1 to 2.5 mm.: in the 

 liver of cats. 



6. AZYGIA Looss. Body elongate; acetabulum near 

 the middle, ovary far back of it, and between the two 

 is the uterus; testes back of ovary: in fish. 



A. loossi Marshall and Gilbert. Length 6 mm.; 

 breadth .5 mm.; body not spinose; yolk glands back of 

 acetabulum: in mouth and stomach of wide-mouthed black 

 bass, pike, and dogfish. 



7. BTTNODERA Raillet. Body 

 ovate; mouth surrounded by 6 con- 

 tractile projections; acetabulum near 

 center of body, with genital pore in 

 front of it; testes in hinder part of 

 body; uterus sac-like: in fresh-water 

 fish. 



B. nodulosa (Zeder). Length 1 to 3 mm.: in 

 the intestine of the perch and other fishes; inter- 

 mediate host the crayfish, being found in cysts in 

 various organs. 



8. RENlFERf Pratt. Body elongate and spinose; 

 acetabulum near the middle of the body with the 

 genital pore between it and the oral sucker; ovary 

 just back of acetabulum; testes lobate and just 

 back of ovary : in reptiles. 



R. ellipticus Pratt (Fig. 303). Body elliptical; genital pore at left 

 edge of body ; 4 mm. long : in mouth of Heterodon platyrhinus, the blowing 

 viper, and other snakes. 



9. PNEUMONCECEst Looss. Body elongate; suckers small, acetabu- 



* See "The Trematode Genus Opisthorchis," by F. D. Barker, Arch. d. Parasit., 

 Vol. 14, p. 513, 1911. 



t See "Descriptions of Four Distomes," by H. S. Pratt, Mark Ann. Vol., p. 25, 

 1903. 



t See "On the American Representatives of Distomum variegatum," by J. 

 Stafford, Zool. Jahrb. Abt. f. Sys., Bd. 16, p. 895, 1902. 



-tt 



Fig. 302 

 Amphimerus 

 pseudo- 

 felineus 

 (Ward). 

 References 

 as in Fig. 293. 



Fig. 303 Renifer 

 ellipticus (Pratt). 



References 

 as in Fig. 293. 



