TREMATODES FROM FISHES — LINTON 123 



Two hundred and sixty-eight collected July 28, 1916, from 12 of 

 14 jBshes, 45 to 74 mm. in length, mainly from stomach; smallest 

 number from one host 2, from a 62-mm. fish; largest number from 

 one host 75, from a 54-mm. fish. Measurements of one in balsam: 

 Length, appendix retracted, 0.87 mm.; breadth, 0.24 mm.; diameter 

 of oral sucker, 0.08 mm., of pharynx, 0.05 mm., of ventral sucker, 

 0.16 mm. ; ova, 0.022 by 0.010 mm. 



From common scup : One, immature, collected August 19, 1919, 

 from a 36-mm. fish. Measurements, in balsam: Length of body, 

 0.63 mm.; of appendix, 0.28 mm.; breadth, 0.14 mm.; diameter of 

 oral sucker, 0.04 mm., of pharynx, 0.02 mm., of ventral sucker, 0.08 

 mm. 



From striped anchovy: Numerous, collected August 15, 1906. 

 These distomes agree with distomes found in the hickory shad 

 {Pomolobvs 7nediocris) on the same date, but were smaller. Speci- 

 mens mounted in balsam are from 0.7 to 0.84 mm. in length, not 

 including the appendix. Measurements in balsam, lateral view: 

 Length, 0.84 mm. ; breadth, 0.18 mm. ; diameter of oral sucker, 0.045 

 mm., of pharynx, 0.027 mm., of ventral sucker, 0.09 mm. ; ova about 

 0.024 by 0.012 mm. 



From lizardfish: Three (U.S.N.M. No. 8328), collected September 

 11, 1928; 15 fishes, from 87 to 137 mm. in length, examined. Meas- 

 urements in balsam: Length, including appendix, 1.17 mm.; length 

 of appendix, 0.35 mm,; breadth, 0.24 mm.; diameter of oral sucker, 

 0.05 mm., of pharynx, 0.03 mm., of ventral sucker, 0.10 mm.; ova, 

 0.024 by 0.009 mm. 



From cunner: One, immature, collected June 30, 1919, from a 12- 

 millimeter cunner. The distome was actively contractile, varying 

 in length from 0.37 to 0.90 mm. 



From codling: One, collected October 29, 1914. Measurements 

 in formalin : Length, 2.4 mm., breadth, 0.45 mm. ; length of appen- 

 dix, 1 mm.; diameter of oral sucker, 0.08 mm.; ventral sucker, 0.17 

 mm. ; ova, 0.028 by 0.011 mm. Length in balsam, 1.76 mm. 



Four, collected July 20, 1929 ; 3 fishes examined. 



Twenty-two (U.S.N.M. No. 8329), collected August 7, 1929, from 

 one fish. 



HEMIURUS LEVINSENI Odhner 



Plate 8, Figures 75-77 



Distonmm ocreatum Molin (part), Linton, Bull. U. S. Fish Coinm. for 1899, 



p. 288, pi. 35, fig. 19, 1900. 

 Hemmrus levensetii Odiiner, Die Trenifitodeu des arktischen Gebietes, Fauua 



Arctica, vol. 4, pp. 348-351, pi. 4, fig. 2, 1905. — Mantek, Illinois Biol. Men., 



vol. 10, No. 2, pp. 92, 93, figs. 62, 63, 1926. 

 Hermiurus levhisenii Odhner, Manter, Journ. Parasit., vol. 12, p. 13, 1925. 



