108 PROCEEDINGS OF THE NATIONAL MUSEUM vol.88 



0.97 mm., breadth, 1.04 mm. Ovary, 0.9 mm. back of ventral sucker, 

 length, 0.14 mm., breadth, 0.25 mm.; testes about equal, length, 0.21 

 nmi., breadth, 0.35 mm. The testes and ovary are close together, the 

 group measuring about 0.46 mm. in length and 0.56 mm. in breadth. 

 Aperture of oral sucker, length, 0.14 mm., breadth, 0.22 mm., of ven- 

 tral sucker, length, 0.35 mm., breadth, 0.24 mm. (U.S.N.M. No. 8304.) 



From barndoor skate: One, fragment (U.S.N.M. No. 8305), col- 

 lected October 28, 1898. One, fragment; length in formalin, 10 mm.. 

 Tv70, collected November 4, 1898; lengths, 24 and 25 mm., respec- 

 tively; breadth, 3.5 mm., nearly linear; neck reflected dorsally; color 

 in formalin yellowish white to ashy gray, with dark blotches. Two, 

 collected October 19, 1903; length of larger specimen, 54 mm.; of 

 nearly uniform size from ventral sucker to middle of postacetabular 

 region, thence tapering very slightly to posterior end ; distance from 

 anterior end to posterior edge of ventral sucker, 9 mm. ; neck reflected 

 dorsally, nearly at right angles to body. Fourteen, collected May 

 13, 1904; longest in formalin, 28 nun. Three, collected October 28, 

 1911; lengths in formalin, 11, 12, and 15 mm., respectively; breadth, 

 2 to 2.25 mm. Three, collected October 10, 1912 ; lengths in formalin, 

 22, 23, and 27 mm., respectively; maximum breadth, 4.5 mm. Six- 

 teen, collected April 29, 1913; length of one in formalin, 47 mm., 

 breadth, 4.5 mm. Five, collected April 30, 1913, 12 to 20 mm. in 

 length in formalin. Five, collected May 6, 1913; 10 to 16 mm. in 

 formalin. Four, collected May 9, 1913; largest in formalin, length 

 27 mm., maximum breadth, 4.5 mm., maximum thickness, 3 mm.; 

 smallest, length, 23 mm., maximum breadth, 3 mm., tapering to pos- 

 terior end; in each the neck was reflected dorsally nearly at right 

 angles to the body. 



The ova, as seen in a series of sections, are about 0.078 mm. by 

 0.051 mm. ; thickness of shell, 0.003 mm. 



From filefish : Immature trematodes encysted under the serous coat 

 of the liver of the filefish are here recorded. One, collected July 11, 

 1910, from serous coat of liver near gall bladder of host; length, 13 

 nmi., diameter, 3.5' mm.; nearly linear, moderately compressed, in- 

 testines voluminous ; in balsam, diameter of oral sucker, 0.60 mm., of 

 pharynx, 0.42 mm., of ventral sucker, 1.18 mm. 



One, collected July 13, 1911, under serous coat of liver of host. 

 Measurem^ents in balsam : Length, 2.24 mm., maximum breadth, 0.73 

 mm.; oral sucker, length, 0.17 mm., breadth, 0.22 mm.; pharynx, 

 length, 0.17 mm., breadth, 0.15 mm. ; ventral sucker, length, 0.31 mm., 

 breadth, 0.35 mm. 



From fishingfrog: Immature distomes from the stomach wall of 

 the goosefish are here recorded. The rudiment of the cirrus pouch 

 lies at the posterior border of the pharynx. Kudiments of the ovary 



