156 Wisconsin Academy of Sciences^ Arts^ and Letters, 
Length of body^ 36 mm.; diameter, 1.1 mm. Lip lobes: length, 
.1 mm.; width, .1 mm.; with thin, auriculate, proximal angles; 
interlabia absent. The cuticula bears about 48 annulations per 
millimeter. The anus is about 1.8 mm. from the posterior end of 
the body. 
Ascaris scaphirh 3 mclii, new species 
(Fig 11) 
Type: Cat. No. 7611, 7612, U. S. National Museum; Lake Pepin, 
Wisconsin; June 20, 1920; collector, A. S. Pearse. Another speci¬ 
men was taken from the stomach of another sturgeon on the same 
date. On June 23 six specimens were taken from the stomach of 
a sand sturgeon. 
Host: the sand sturgeon, Scaphirhynchus platorhynchus 
(Rafinesque) ; intestine. 
Length of females, 41 mm.; width, 1 mm.; length of male, 33; 
width, .9 mm, Cuticula with about 105 annulations per millimeter. 
Anus of female .4 mm. from posterior end; of male, .2 mm. 
Lips, .17 mm. long and .15 mm. wide; rounded at tip; base re¬ 
curved toward tip so that lateral angles are auriculate; two small 
papillae on either side of inner surface near distal end. Inter¬ 
labia conical, rounded at tip, .05 mm. in length. 
Posterior end of female, conical, rounded at tip; at .08 mm. 
from the end it tapers at a more acute angle and beyond this point 
is somewhat bent ventrally. Spicules of male .025 in diameter and 
,3 mm. long; somewhat curved, obliquely truncate at tip. 
Cystidicola serrata (Wright) 
(Fig. 13) 
Sixteen specimens of this species were taken from the intestine 
of a sheepshead, Aplodinotus grunniens Rafinesque, caught in Lake 
Pepin, Wisconsin; July 13, 1920. 
The largest female (Cat. No. 7609, U.S.Nat.Museum) is 12.25 mm, 
long, and .098 mm. wide; male, 7.53 mm.; .051 mm. In the fe¬ 
male the anterior portion of pharynx is .4 mm. long; posterior 
portion, 2 mm. Ulva, 6.1 mm. from anterior end; anus, .2 mm. 
from posterior end. There are ten conical teeth surrounding the 
