TREMATODES FROM FISHES — LINTON 



107 



The following measurements are given for purposes of comparison 

 with measurements tabulated in Manter's monograph: 



Table 27. — Measurements of nine specimens of Azygia longa 



Measurement 



Length 



Breadth 



Oral sucker, diameter ^.. 



Oral sucker, length-- 



Oral sucker, breadth - 



Pharynx, length 



Pharynx, breadth 



Ventral sucker, diameter ." ..- 



Ventral sucker, length 



Ventral sucker, breadth 



Posterior edge of ventral sucker to middle 



of ovary 



Posterior edge of ventral sucker to anterior 



end - - 



Posterior edge of ventral sucker to anterior 



vitellaria 



Posterior edge of testes to posterior end 



Vitellaria on left beyond testes 



Vitellaria on right beyond testes 



Mm. 



6.65 

 .70 

 .56 



2.33 

 1.71 



.42 

 1.71 



1.02 



Mm. 



6.46 

 .63 

 .53 



2.10 



1.54 



.28 

 1.33 

 1.26 

 1.23 



3» 



Mm.. 



7.00 



.91 



.49 

 .63 

 .21 

 .21 



2.24 

 1.47 



.24 

 1.89 



.78 

 1.05 



4« 



Mm. 

 5.74 

 .70 



1.96 



.35 

 1.33 



±.90 



±.42 



5a 



Mm. 



5.39 



.60 



.32 

 .39 



2.06 



1.72 



.35 

 1.12 



±.34 

 ±.56 



ea 



Mm. 



4.90 



.59 



.35 

 .49 

 .21 

 .17 



.28 

 .38 



2.10 



1.12 



.35 

 1.15 

 .90 



M7n. 



2.10 



.42 



.25 

 .27 



.60 



8» 



Mm. 



4.00 



.43 



.42 

 .42 

 .21 

 .16 



.32 



.25 



.47 



1..51 



±.14 

 .80 



±.28 

 ±.2l 



Aim. 



3.00 



.63 



1.92 

 ±.15 



• Balsam mounts from Esox nlger. 



' Balsam mounts from Mkropterus dolomieu. 



* Sagittal sections. 



• Frontal sections from TricMurus lepfurm. 



Genus OTODISTOMUM Stafford. 1904 



OTODISTOMUM CESTOIDES (van Bcnedcn) 



Distomum cestoides van Beneden, Mem. Acad. Roy. Belgique, vol. 38, p. 17, 



pi. 4, fig. 9, 1870. 

 Distomum veliportim Creplin (?), Linton, Proc. U. S. Nat. Mus., vol. 20, pp. 



521, 522, 1898. 

 Otodistomum veliporum Creplin, Stafford, Zool. Anz., vol. 27, pp. 482, 483, 1904. 

 Xenodistomum. nielanocystis, ibid., p. 483. 

 Otodistomum cestoides (van Beneden), Manter, Illinois Biol. Mon., vol. 10, No. 



2, pp. 140-186, figs. 1-6, &-10, 23-26, 28, 1926. 



An intensive study of this distome has been made by Manter, loc. 

 cit. 



Hosts. — Clear ray (Raja diaphanes), barndoor skate (Raja laevis), 

 filefish {Ceratacanthus schoepfl)^ fishingfrog {Lojyhius piscatorius) ^ 

 rudderfish {Palinurichthys percifomds). 



Record of collections. — From clear ray: One, immature (U.S.N.M. 

 No. 8304), collected May 18, 1914. Measurements in formalin: 

 Length, 7.5 mm. ; breadth, 1.5 mm. ; thickness, 1 mm. Measurements 

 in balsam: Length, 5.5 mm.; maximum breadth, at level of ventral 

 sucker, 1.33 mm., breadth midway between ventral sucker and pos- 

 terior end, 1.29 mm. ; oral sucker, length, 0.66 mm., breadth, 0.70 mm. ; 

 pharynx, length, 0.38 mm., breadth, 0.21 mm. ; ventral sucker, length, 



