TREMATODES FROM FISHES — LINTON 



99 



Table 24. — Measurements of five specimens of Homalometron pallidum in talsani 



Measurement 



Length 



Length of neck. . _ 



Maximum breadth 



Oral sucker, length 



Oral sucker, breadth 



Length of prepharynx. . 



Pharynx, length 



Pharynx, breadth 



Length of esophagus 



Ventral sucker, length.. 

 Ventral sucker, breadth 



Ovary, length 



Ovary, breadth 



First testis, length 



First testis, breadth 



Second testis, length 



Second testis, breadth.. 

 Ova 



Mm. 

 4.48 

 1.02 

 .98 

 .29 

 .29 

 .21 

 .11 

 .12 

 .07 

 .30 

 .28 

 .23 

 .21 

 .23 

 .22 

 .56 

 .35 

 , 10 by .09 



Aim. 



3.15 

 .75 



1.14 

 .26 

 .22 

 .05 



.04 

 .24 

 .24 

 .17 

 .25 

 .31 

 .45 

 .77 

 .70 

 . 10 by .06 



Mm. 

 3.08 

 .77 

 .74 

 .24 

 .28 

 .17 

 .]0 

 .07 

 .05 

 .25 

 .25 

 .14 

 .17 

 .33 

 .32 

 .39 

 .35 

 , 10 by .05 



Mm. 

 2.68 

 .77 

 .63 

 .25 

 .25 

 .14 

 .10 

 .11 

 .07 

 .19 

 .15 

 .14 

 .12 

 .24 

 .24 

 .18 

 .26 

 . 10 by .07 



Mm. 



1.79 

 .42 

 1.19 

 .22 

 .24 

 .00 

 .05 

 .05 

 .00 

 .28 

 .28 

 .17 

 .24 

 .14 

 .39 

 .21 

 .43 



. 10 by .06 



From white perch: Five (U.S.N.M. No. 8294), collected April 28, 

 1914; tv70 fishes examined. Largest, in formalin, length, 4 mm.; 

 breadth, 1.35 mm. Measurements in balsam: Length, 2.94 mm.; 

 breadth, 1.05 mm. ; oral sucker, length, 0.35 mm., breadth, 0.39 mm. ; 

 pharynx, length, 0.15 mm., breadth, 0.13 mm. ; ventral sucker, length, 

 0.39 mm., breadth, 0.42 mm. ; no ova. Seminal vesicle dorsal to right 

 border of ventral sucker, extending back of ventral sucker and over- 

 lapping the ovary, seminal receptacle dorsal to posterolateral border 

 of ovary; yolk reservoir between ovary and first testis. 



From winter flounder : The distome recorded from this host under 

 the name D. glohiphorum Rudolphi (Bull. XJ. S. Fish Comm. for 

 1899, p. 486, fig. 347, 1901), probably belongs here. Nine (U.S.N.M. 

 No. 8295), collected July 28, 1905; length, 4 mm. One, collected Feb- 

 ruary 10, 1913 ; 30 fishes examined ; length, 3 mm., in formalin. Five, 

 collected October 16, 1914; one fish examined. Sixteen, collected 

 February 16, 1915; four fishes examined. 



Table 25. — Record of distomes of Homalometron pallidum from young 

 Pseudopleuronectes americanus 



Fishes 

 exam- 

 ined 



Date collected 



Length of fishes 



Fishes 

 parasit- 

 ized 



Degree of 



parasit- 



ization 



Total 

 distomes 



Appendicu- 



late distomes 



found 



65 

 264 

 >14 

 >12 

 U4 

 »12 



10 dates, June 30 to Sept. 10. 

 28 dates, June 27 to Sept. 18. 



July27, 1915 



June 27, 1916 



July28 



Aug. 1 



Mm. 

 100 to 190. 

 21 to 98... 



23 

 187 

 10 



1-40 

 1-484 

 3-317 



2-75 

 3-5 



173 



5,516 



1,195 



1 



268 



None. 

 On 4 dates. 



> Seined in Katama Bay. 



• Seined in Great Harbor. 



* Seined at Monument Boacb. 



