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PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 88 



ill front of the first testis, and at about the middle of the post-acetabu- 

 lar region ; seminal receptacle at posterior border of ovary ; vitellaria 

 diffuse, extending from posterior end to the seminal vesicle, in most 

 cases interrupted at the levels of the testes and ovary. The uterus lies 

 between the ovary and the ventral sucker, passing ventral to the 

 seminal vesicle, then to the left of the cirrus bulb to the genital pore. 



Table 22. — Measurements of four specimens of Lepidapedon elongatum, Nos. 

 1 and 2 in glycerin, Nos, 3 and 4 in balsam 



Measurement 



Length 



Breadth of neck 



Breadth of body 



Diameter of oral sucker 



Pharynx, length 



Pharynx, breadth 



Diameter of ventral sucker. 



Length of prepharynx 



Ova — 



Mm. 



2.03 

 .27 

 .29 

 .10 

 .08 

 .04 

 .10 

 .13 

 .07 by .04 



From pollack: One (U.S.N.M. No. 8285) collected May 28, 1913. 

 Length, in formalin, 2.03 mm. ; breadth, 0.35 mm. Measurements in 

 balsam: Length, 1.68 mm.; breadth, 0.35 mm.; diameter of oral 

 sucker, 0.08 mm. ; pharynx, length, 0.08 mm., breadth, 0.04 mm., ven- 

 tral sucker, length, 0.07 mm., breadth, 0.08 mm.; length of esophagus, 

 0.19 mm.; ova, 0.06 by 0.03 mm. Slender, of nearly same breadth 

 throughout, neck slightly attenuate, and posterior end slightly taper- 

 ing to blunt point. Details of anatomy in close agreement with 

 distomes from cod. 



From summer flounder: Distoma sp., Bull. U. S. Fish Comm. for 

 1899, pp. 482, 483, figs. 345, 352, 1901. 



From codling: One (U.S.N.M. No. 8286), collected October 28, 

 1914; 10 fishes examined. Length, in formalin, 5.25 mm., breadth, 

 0.67 mm.; diameter of oral sucker, 0.18 mm., of ventral sucker, 

 0.18 mm. 



One, collected August 20, 1915. Measurements in balsam : Length, 

 2.66 mm.; breadth, 0.49 mm.; diameter of oral sucker, 0.09 mm., of 

 ventral sucker, 0.09 mm.; pharynx, length, 0.07 mm., breadth, 0.054 

 mm.; length of prepharynx, 0.12 mm., of esophagus, 0.10 mm.; ova, 

 0.060 by 0.045 mm. 



The neck in each of these distomes from the hake was slightly 

 tapering anteriorly, there being no indication of the spatulate condi- 

 tion noted in distomes from the cod. 



From goggler: One, collected August 29, 1913. Small, spinose, 

 immature. Measurements, life : Length, 0.7 mm. ; breadth, 0.16 mm. 



