AiiT. 3. NEW TREMATODES FROM AMPHIUMA MEANS CHANDLER. 



EXPLANATION OP PLATES. 



ABBREVIATIONS. 



c. s., Cirrus sac. 



e. p., excretory pore. 



e. r., excretory reservoir. 



g. p., genital pore. 



1. c, Laurer's canal. 



m., metraterm. 



c, ovary. 



ce., esophagus. 



o. s., oral sucker. 



ph., pharynx. 



s. g., shell gland. 



sp. d., sperm duct. 



s. r., seminal receptacle. 



t, testes. 



u., uterus. 



u. d., uterus, descending portion. 



u. a., uterus, ascending portion. 



v., vitellaria. 



va., vagina. 



V. d., vitelline duct. 



V. s., ventral sucker. 



Plate 1. 



X 34. 



Fig. 1. Ccphalogonwius amphiumuc, new species, ventral view. 

 2. Telorchis stnnkardi, new species, dorsal view. X 34. 



Plate 2. 



Fig. 3. Megalodiscus americanus, new species, dorsal view. X 34. 



4. Same, lateral view. X 34. 



5. Cross section of posterior sucker of Megalodiscus americanus. X 22. 



LITERATURE CITED. 



1910. Blaizot, L. Un nouveau trgmatode Cephalogonimus curopaeus, parasite 



intestinal de Rana esculcnta L. Bull. See. Zool. de France, vol. 35, 



pp. 34-38, 1 fig. 

 1904. CoHN, L. Helminthologische Mitteilungen, 2. Arch. f. Naturg., vol. 70, 



pt. 1, pp. 229-252, pi. 11, figs. 1-16. 

 1921. MacCallum, G. a. Studies in Helminthology. Zoopathologica, N. Y., 



vol. I, pp. 137-284, figs. 69-151. 

 1912. NicKERsoN, W. S. On Cephalogonimtis vesicaudus, n. sp. Zool. Jahrb., 



Abt. f. Syst., vol. 33, pp. 249-256, pi. 8, figs. 1-8. 

 188G. PoiRiER, J. Tr^matodes nouveaux ou peu connus. Bull. Soc. Philomat. 



de Paris, ser. 7, vol. 10, pp. 20-40, pis. 1-4, 30 figs. 

 1902. Stafford, J. Cephalogonimus americanus (new species). Centralbl. f. 



Bakteriol., Abt. 1, vol. 32, pp. 719-725, 1 pi., figs. 1-4. 

 1917. Stunkabd, H. W. Studies on North American Polystomidae, Aspidogas- 



tridae and Paramphistomidae. Illinois Biol. Monographs, vol. 3, pp. 



283-394, pis. 1-11, figs. 1-79. 



