154 Wisconsin Academy of Sciences, Arts, and Letters. 
Ovary .42 by .32 mm., lobate, on left side of body. Vitelline 
glands, ovate, slightly lobate, .25 by .13 mm. Uterus, slender, 
coiled throughout the body posterior to the acetabulum and on 
each side of the acetabulum through about half its length; filled 
with eggs; the coiled terminal duct passes dorsal to the acetabulum 
to the genital pore, which lies about midway between the anterior 
margin of the acetabulum and the junction of the intestinal rami. 
The two testes lie between the intestinal rami, posterior to the 
vitelline glands, usually in contact with each other; the anterior one 
is on the right side, the posterior one is in the middle of the body; 
both have deeply incised lobes; the right one measures .35 by 
.65 mm., the median one .45 by .8 mm. Seminal vesicle about .3 mm. 
long and .17 wide. 
Phyllodistomum Stafford!, new species 
(Pig. 3) 
Type: Cat. No. 7624, U. S. National Museum; Lake Michigan, 
Sturgeon Bay, Wisconsin; July 21, 1920. Other specimens were 
found in Ameinrus melas (Rafinesque). 
Host: the speckled bullhead, Ameiurus nedulosus (Le Seur) ; 
urinary bladder. 
Length of body, 4.1 mm.; width, 2.98 mm. Diameter of oral 
sucker, .38 mm.; acetabulum, .52 mm. Egg, .027 by .021 mm. 
Anterior quarter of body narrow, flattened, sharply set off from the 
posterior portion by a groove. Behind the middle of the acetabu¬ 
lum the body is discoidal, being nearly circular in outline; the 
margins are thin, but not crinkled, and are covered with minute 
papillae. The esophagus is short—a little less than the diameter 
of the oral sucker in length. The intestinal rami are quite wide 
(about .3 mm.) and extend to the posterior eighth of the body. 
The genital pore is nearer the anterior margin of the acetabulum 
than the junction of the intestinal rami, and is median. The testes 
are nearly equal in size, the left being a little larger, irregularly 
lobate, and lie on either side of the body; latero-posterior to the 
vitelline glands. The left testis is a little more posterior than the 
right, and the ovary lies between it and the nearest vitelline gland. 
The testes are small, measuring about .42 mm. in diameter. There 
is a seminal vesicle, about .5 by .7 mm. 
The ovary is elongated, lobate, and measures about .25 mm. in 
length. The two vitelline glands are each composed of about eight 
