28 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. tl 



of 8, 0.31; maximum, oral sucker 0.25, ventral sucker 0.35; mini- 

 mum, oral sucker 0.17, ventral sucker 0.22; maximum length of male,. 

 7 mm., minimum 3 mm. ; diameter of oral sucker of a female 0.050, of 

 ventral sucker 0.056. In one male, length 4.62; oral sucker, length 

 0.24, breadth 0.22 ; ventral sucker, length 0.32, breadth 0.31. In most 

 cases the intestine contained dark brown material. In one male 

 measuring 3.9 mm. in length the intestine divided at a point about 

 1.4 mm. from the anterior end, and the two rami united about 1.4 

 mm. from the posterior end. 

 Larus Philadelphia. 



1912, December 21. 6; lengths from 4.5 to 5 mm. The males are 



rather plump; one, 4 mm. in length, has a 

 maximum diameter of 0.52 ; diameter, lateral 

 view, of oral sucker 0.13, of ventral sucker 

 0.17. In one specimen, length about 3.2 mm.,, 

 the bifurcation of the intestine is about 0.77 

 from the anterior end, and the rami unite 

 about 1.26 from the posterior end. The cuti- 

 cle is missing from all, longitudinal muscle 

 fibers appearing in the superficial layer, 

 (Cat. No. 7947, U.S.N.M.) 

 Nycticorax nycticorax naevius. 



1913, July 3. 1 pair. These were rather fragile, and in the 



process of examination the female was lost. 

 Length of male, in balsam, 3.36 mm. ; diam- 

 eter of oral sucker about 0.10, of ventral 

 sucker, very indistinct, about 0.11. 



Oidemia deglandi. 



1913, August 14. 1, male, length 6 mm. ; maximum diameter 0.45 ; 



diameter of oral sucker 0.17, ventral sucker 

 0.21; distance of anterior edge of ventral 

 sucker from anterior end 0.46. This speci- 

 men, in balsam, measures 4.2 mm. in length. 

 The point of bifurcation of the intestine ap- 

 pears to be about 1.4 from the anterior end^ 

 and the point at which the rami unite, about 

 1.2 from the posterior end. (Cat. No. 7948» 

 U.S.N.M.) 



