532 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 57. 



FlQS. 1-6.1.41.— HETEROPHYES HETEROPHYES. VENTR.VL VIEW. X ^0. AFTER LOOSS, 1896. 2.— HET- 

 ER0PHYE3 HETEROPHYES. ChITINOUS RODLETS OF GENITAL SUCKER. X 525. AFTER LOOSS, 1896. 

 3.— HETEROPHYES FR.\.TERNUS. VENTRAL VIEW. X 128. AFTER LOOSS, 1896. 4.— HETEROPHYES 



PERSICU3. Ventral view. X 17. After Braun, 1901. 5.— Metagonimus yokogawai. Dorsal 



VIEW of adult from dog. X ABOUT 75. AFTER YOKOGAWA, 1913. 6.— MeTAGONIMUS YOKOGAWAI. 



Encysted cercaria from scale of fish, x about 100. After Yokogawa, 1913. [For explana- 

 tion OF LETTERING SEE FOOTNOTE.] 



1 EXPLANATION OF LETTERING USED IN ILLUSTRATIONS. 



ac, ventral sucker, ap., appendix, e., esophagus, ex. c, excretory canal or vesicle. 

 ear. p., excretory pore. y. c, opening of genital canals, g. p., genital pore. g. s., genital 

 sucker, i., intestinal ceca. I., dorsal lip. I. b., lenticular body, m., mouth with oral 

 sucker, o. c, oral cecum, ov., ovary, p., pharynx, p. p., prepharynx. pr., prostatic 

 portion of vas deferens, r. »., seminal receptacle, t., testis, ut., uterus, v. d., vas 

 deferens, v. e., vas efferens. v. g., vitellaria. v. a., seminal vesicle. 



