TREMATODES FROM FISHES — ^LINTON 



141 



From common gurnard : A distome, collected August 21, 1911, by 

 Dr. G. A. MacCallum, belongs here. 



From northern barracuda: One (U.S.N.M. No. 8370), collected 

 August 31, 1903; four fishes examined. Measurements in balsam, 

 appendix retracted : Length, 3.36 mm. ; breadth, 1 mm. ; oral sucker, 

 length, 0.18 mm., breadth, 0.23 mm.; pharynx, length, 0.13 mm., 

 breadth, 0.14 mm.; diameter of ventral sucker, 0.48 mm.; ova, 0.018 

 by 0.012 mm. Testes about equal, diameter 0.54 mm, ; ovary, length 

 0.35 mm., breadth 0.43 mm.; seminal vesicle, length 0.56 mm., 

 breadth, 0.33 mm. 



From lizardfish: Three (U.S.N.M. No. 8371), collected September 

 10, 1928 ; fifteen fish, 75 to 125 mm. in length, examined ; fish seined at 

 Wareham. 



Table 33. — Measurements of three specimens of Dinurus pinguis in balsam 



Measurement 



Length 



Breadth -.. 



Oral sucker, length 



Oral sucker, breadth 



PharyiLx, length... 



Pharynx, breadth 



Ventral sucker, length.. 

 Ventral sucker, breadth 



Aim. 



1.93 

 .24 

 .36 

 .21 

 .20 

 .70 

 .63 



1 No. 1, ventral view; Nos. 2 and 3, lateral view. 



Ova crowded, collapsed, about 0.018 by 0.009 mm. 



DINURUS TORNATUS (Rudolphi) 



Distomum tomatum Rudolphi, Linton, Proc. U. S. Nat. Mus., vol. 20, pp. 513, 

 514, pi. 42, figs. 6-12 (from Coryphaena Mppurus), 1898; Bull. U. S. Fish 

 Comm. for 1899, p. 452, 1901; Bull. U. S. Bur. Fisheries, vol. 24, p. 373 

 (from C Mppurus), p. 374 (from C equisetis), 1905. 



The posterior end of a distome (U.S.N.M. No. 8372) that had been 

 broken just behind the ventral sucker was obtained from a harvest- 

 fish (PepHlus paru) on July 24, 1908. The fragment was active, 

 anterior portion serrate; intestines and uterus extending nearly to 

 posterior end of appendix. Seminal vesicle large, diagonal, its pos- 

 terior end near anterior border of first testis; testes diagonal, touch- 

 ing each other, first testis triangular in outline, second elliptical, 

 length of each 0.32 mm., breadth, 0.21 mm.; ovary a short distance 

 behind testes, length, 0.25 mm., breadth, 0.32 mm.; body of nearly 

 uniform diameter, 0.7 to 0.8 mm. ; appendix, diameter at anterior end, 

 0.7 mm., tapering uniformly to posterior end. From anterior end of 

 fragment to seminal vesicle 0.4 mm., to first testis, 0.7 mm., to ovary. 



