64 PROCEEDINGS OF THE NATIONAL MUSEUM vol.88 



Host. — Nortliern barracuda {Sphyraena horealis). 

 Record of collection.— One (U.S.N.M. No. 8218), collected October 

 29, 1926 ; 163 fishes examined. 



LEBOURIA species 

 Plate 3, Figube 24 



Host. — Common flatfish {Psevdopleuronectes americanus). 



Record of collection. — One specimen, collected May 16, 1916. 

 Dimensions in balsam : Length 1,26 mm. ; breadth 0.98 mm. ; diameter 

 of oral sucker 0.21 mm., of pharynx 0.09 mm., of ventral sucker 0.35 

 mm.; ova 0.072 by 0.034 mm. (U.S.N.M. No. 8219.) A small dis- 

 tome, near L. trwncata., somewhat damaged and distorted, being 

 broken on the left side near the posterior end, where a mass of eggs 

 protrudes, and having the posterior end folded mider ventrally. The 

 testes appear to be nearly transverse, but the left testis has probably 

 been crowded back by the mass of ova between it and the ventral 

 sucker. Body smooth, ovate, broadest at level of testes, which are 

 nearly transverse and near the posterior end ; testes nearly circular in 

 outline ; ovary lobed, near anterior border of right testis ; shell gland 

 to left of ovary, median; vitellaria extend forward to level of oral 

 sucker, follicles coarse, concealing intestines. So far as the anatomy 

 can be made out there is a rather close agreement with the distomes 

 from Cynoscion regalis. 



Genus PODOCOTYLE Dujardin, 1845 



PODOCOTYLE ATOMON (Rudolphi) 



Plate 1, Figures 1-7 



Distomnm simplex Rudolphi, Linton, Bull. U. S. Fish Comm. for 1899, p. 485, 



1901. 

 Sinistropns simplex (Rudolphi), Staffoed, Zool. Anz., vol. 27, pp. 484, 485, 1904. — • 



Cooper, Trans. Roy. Soc. Canada, ser. 3, vol. 9, sect. 4, pp. 185, 186, fig. 



6-8, 1915. 

 Podocotyle atomon (Rudolphi), Manter, Illinois Biol. Mon., vol. 10, No. 2, ijp. 



207, 208, fig. 49, 1926. 



Body smooth, usually of nearly same breadth throughout; ventral 

 sucker larger than oral ; prepharynx short, esophagus as long as or 

 longer than pharynx ; intestines extend to posterior end ; genital pore 

 to left of median line, approximately near level of posterior end of 

 pharynx; cirrus pouch anterior and dorsal to ventral sucker; seminal 

 vesicle extending but a short distance back of ventral sucker ; testes 2, 

 relatively small, one following the other, in some cases with little or 

 no interval between them, in others with an interval into which 

 follicles of the vitellaria are inserted; ovary in front of first testis, 



