TREMATODES FROM EISHES — LINTOIT 105 



2.25 mm.; breadth, 1.5 mm.; thickness, 1.6 mm.; ova, 0.077 by 

 0.042 mm. 



Measurements in balsam: Length, 1.12 mm.; breadth, 0.84 mm.; 

 diameter of oral sucker, 0.42 mm., of ventral sucker, 0.42 mm. ; ova, 

 0.045 by 0.030 mm. to 0.069 by 0.045 mm. 



Details of the anatomy are hidden by the mass of ova. This species 

 has been found in Canada by Stafford (Zool. Anz., vol. 27, pp. 489, 

 490, 1904). So far as the anatomy can be made out these distomes 

 are in agreement with Stafford's material, although they are some- 

 what smaller. The measurements of the ova are not given by Staf- 

 ford. Looss (Zool. Jahrb., vol. 12, p. 598, 1899) gives the size of the 

 ova 0.10 by 0.05 mm. He notes also the occurrence of miracidia with 

 eye spots in the ova. 



Family AZYGIIDAE Odhner, 1911 

 Genus AZYGIA Looss, 1899 



AZYGIA LONGA (Leidy) 



PiATE 22, Figures 292-297 



Azygia lonya (Leidy), Mantek, Illinois Biol. Mon., vol. 10, no. 2, pp. 63-72, 

 figs. 19, 20, 30, 1926 (synonymy, p. 63). 



Upon reviewing the distomes in my collection I find examples from 

 three species of fishes, two fresh water and one marine, which, ac- 

 cording to Manter's synopsis (loc. cit., p. 78) are to be referred to 

 the species Azygia long a (Leidy). A brief description of this ma- 

 terial is given as supplementary to Manter's careful diagnosis of this 

 widely distributed and variable species. 



Hosts. — Eastern pickerel {Esox niger), small-mouthed black bass 

 {Micropierus dolomieu), cutlassfish {TricJdurus lejjtm'us). 



Record of collections. — From eastern pickerel, 12 distomes 

 (U.S.N.M. No. 8302) attached to w^alls of stomach, collected May 5, 

 1898, by F. L. Harvey, Orono, Maine. Neck and anterior part of 

 body nearly cylindrical ; posterior part of body may be slightly com- 

 pressed, smooth, but with fine transverse rugae; oral sucker larger 

 than ventral; pharynx short, cylindrical; esophagus very short; in- 

 testinal rami reach to posterior end. Genital pore at anterior border 

 of ventral sucker, on median line; cirrus-pouch, enclosing the pros- 

 tate gland and coiled vas deferens, at anterior dorsal border of ventral 

 sucker ; cirrus and metraterm opening into a common atrium. Testes 

 small, near together, one following the other, nearer to posterior end 

 than to ventral sucker. The ovary is in front of the first testis, from 

 which it was separated, from 0.08 to 0.15 mm. The shell gland and 

 yolk reservoir are situated on the anterior and anterodorsal border 

 of the ovary. Laurer's canal was noted, but no seminal receptacle 



