TREMATODES FROM FISHES — LINTON 77 



Record of collecUons. — From shad: One, collected July 13, 1910. 

 Measurements, life : Length, 1.75 mm., breadth, 0.52 mm. ; diameter of 

 oral sucker, 0.14 mm. ; pharynx, length, 0.13 mm., breadth, 0.09 mm. ; 

 ventral sucker, length, 0.21 mm., breadth, 0.26 mm.; o\^a, 0.058 by 

 0.034 mm. One, collected July 5, 1923, by Dr. G. A. MacCallum. 



From sand launce : Three, collected July 5, 1912 ; small, turgid, with 

 prominent ventral suckers. Measurements, life, compressed : Length, 

 2.1 mm., breadth, 0.35 mm. ; diameter oral sucker, 0.14 mm., of phar- 

 ynx, 0.14 mm., of central sucker, 0.22 mm.; ova, 0.045 by 0.027 mm. 



Recorded from common herring : Bull. U. S. Fi.sli Comm. for 1899, 

 p. 437, 1901. 



Recorded from squeteague: Bull. U. S. Fish Comm. for 1899, p. 

 460, 1901. 



Recorded from mackerel scad : Bull. U. S. Fish Comm. for 1899, 

 p. 449, 1901. Nine (U.S.KM. No. 8247), collected September and 

 October, 1913; length, in balsam, 2.52 mm., breadth, 0.35 mm. 



From pinfish: One (U.S.N.M. No. 8248) collected June 4, 1914; 

 length, 3.6 mm., breadth, 0.67, in formalin. 



Recorded from conger eel : Bull. U. S. Fish Comm. for 1899, p. 436, 

 1901. One, collected July 22, 1904; length, 2.5 mm., breadth, 0.65 

 mm., in fresh water, turgid. 



Recorded from rusty dab : Bull. U. S. Fish Comm. for 1899, p. 485, 

 1901. Measurements in balsam: Length, 1.12 mm., breadth, 0.22 mm.; 

 oral sucker, length, 0.11 mm., breadth, 0.1 mm. ; Pharynx, length, 0.1 

 mm., breadth, 0.09 mm.; ventral sucker, length, 0.18 mm., breadth, 

 0.17 mm. ; ova, 0.051 by 0.036 mm. 



From spot: Collected by Vinal N. Edwards on five dates in Sep- 

 tember, nine in October, and two in November, 1912, 1913, and 1914; 

 225 fishes were examined and 59 distomes found. The greatest num- 

 ber secured on any date was ten, when 42 fishes were examined. 

 Length, 2 to 3.5 mm. in formalin. Twenty-five or more distomes 

 from this lot are mounted in balsam. Measurements of a typical 

 form : Length, 2.14 mm., breadth, 0.42 mm. ; oral sucker, length, 0.13 

 mm., breadth, 0.14 mm.; pharynx, length, 0.11 mm., breadth, 0.11 

 mm.; ventral sucker, length, 0.19 mm., breadth, 0.21 mm.; ova, 0.051 

 by 0.027 mm. (U.S.N.M. No. 8249). 



From windowpane: Four, collected July 27, 1904; small, turgid, 

 with prominent ventral suckers. Numerous (U.S.N.M. No. 8250), 

 collected August 8 and 11, 1905; small, about 0.9 mm. in length; very 

 various shapes; some short and broad, some flattened, others cylin- 

 drical ; some with sessile, others with pedicelled ventral suckers ; some 

 with distinct papillate border surrounding the ventral sucker, in 

 others papillae indistinct. Same variations in balsam mounts as 

 noted in fresh material. Nine, collected July 18, 1923, found by Dr. 



