512 Wisconsin Academy of Sciences, Arts, and Letters, 
The ganglion is relatively small and saccate; neither eyespot 
nor retrocerebral organ are present. 
Total length 200/x; toes 35/^. 
Cephalodella parasitica is usually found attached to the cuticle 
of various oligochaetes (Stylaria, Chaetogaster). There is no rea¬ 
son for considering it a true parasite; it leaves the host readily 
and swims as well as other members of the genus; in all prob¬ 
ability the temporary attachment is simply a method of trans¬ 
portation. We have collected this species in shallow bays of Mamie 
Lake, Vilas County, and Lake Kathan, Oneida County, Wisconsin. 
CEPHALODELLA EUPODA Myers, new species. 
Plate XXXVI, figure 7. 
The body is moderately slender and gibbous dorsally. The 
head is large, somewhat longer than wide. The neck is well 
marked. The abdomen increases gradually in width for about half 
its length, and from this point tapers towards the base of the foot, 
which is marked by a slight constriction. The integument is very 
flexible and there is no trace of the lorica. The foot is large and 
conical; the minute tail is somewhat beyond mid-length. The toes 
are blade-shaped, short and slightly decurved; they increase 
slowly in width for nearly half their length, then decrease more 
rapidly to conical, acute points about one third the length of the 
toes; their entire length is one seventh of the total length. 
The corona is very slightly oblique and without projecting lips. 
The mastax is fairly large and of normal type; the manubria 
are somewhat stouter than usual and bent at an obtuse angle 
near mid-length. The oesophagus is very long and convoluted. 
The ganglion is large and saccate; there is no eyespot and no 
trace of the retrocerebral organ. 
Total length ISO^u,; toes 22/x. 
A few specimens of Cephalodella eupoda were collected some 
years ago at Four Mile Kun, near Washington, District of Co¬ 
lumbia; it has not been found elsewhere. 
CEPHALODELLA LIPAEA Myers, new species. 
Plate XXXVI, figure 5. 
The body is extremely short, stout and nearly cylindric. The 
head is enormous; its length is nearly haK the length of the body. 
