104 PROCEEDINGS OF TPIE NATIONAL MUSEUM vol. 88 



fishes; small, greenish or yellowish white, usually rather squarish in 

 outline; that is, ends truncate and sides linear; lateral margins of 

 neck expanded, in some cases folded under ventrally. 



Two, collected August 9, 1906, from intestine of one fish. One, 

 collected August 10, 1906, from intestine of one fish. Four, collected 

 August 16, 1906, from intestine of one fish. Three, collected August 

 17, 1906, from intestine of one fish. Four, collected August 18, 1906, 

 from intestine of one fish. Five, collected August 23, 1906, from 

 intestine of one fish. One hundred and fourteen, collected August 1, 

 1907, from the intestines of two fishes. Thirty-four, collected August 

 2, from one fish. Many, collected August 10, from one fish. One 

 hundred and fifty-one, collected June 28, 1910, from intestines of four 

 fishes. 



One hundred and ten, collected June 30, 1910, from two fishes; 

 yellovrish white, some rose color; shape irregular, many almost rec- 

 tangular, others roughly triangular, tapering anteriorly and retuse 

 at posterior end, a few arcuate ; flattened under the cover-glass they 

 become oblong with bluntly rounded anterior, and more or less trun- 

 cated posterior ends. Measurements of largest, life : Length, 3.95 mm. ; 

 breadth, 1.57 mm.; diameter of oral sucker, 0.39 mm., of pharynx, 

 0.35 mm., of ventral sucker, 0.39 mm. 



Ninety-three, collected July 5, 1910, from nine fishes. Twenty, 

 collected July 27, from one fish ; one of these, an adult with ova, from 

 a cyst on the intestine of the host. Twenty-eight, collected July 5, 

 1910, from each of tAvo fishes, number not recorded. One, collected 

 September 6, 1910; two fishes examined. Fifty-two, collected June 

 1, 1914, from 15 fishes. Forty-five, collected June 8, 1914, from one 

 fish. One hundred and thirty-nine, collected June 9, 1914, from one 

 fish, six fish examined. Eight3^-eight, collected June 8, 1915, from 16 

 fishes. One, collected July 2, 1915. 



Family BUNODERIDAE Nicoll 



Genus BUNODERA Railliet, 1S96 



BUNODERA NODULOSA (Froelich) 



Plate 22, Figui?es 290, 291 



On April 23, 1914, Mr. Edwards examined 12 yellow perch {Perca 

 ■fiavescens) and found two distomes that appear to belong to this 

 species (U.S.N.M. No. 8301). 



Note on formalin material: Globular, or nearly so; dorsal region 

 and neck white; ventral region swollen with ova, in which the eye 

 spots of the contained miracidia can be seen; ventral sucker white 

 with circular opening, slightly prominent, like an inverted saucer. 

 The mouth is surrounded by six short, blunt papillae. Length, 



