484 Wisconsin Academy of Sciences, Arts, and Letters. 
CEPHALODELLA VENTRIPES (Dixon-Nuttall). 
Plate XXVIII, figure 5, 
Diaschiza ventripes Dixon-Nuttall, Journ. Quekett Mier. Club, ser. 2, vol. 
8, 1901, p. 25, pi. 2, figs. 1-3.— ^Dixon-Nuttall and Freeman, Journ. 
Eoyal Micr. Soc., 1903, p. 14, pi. 2, fig. 7 .—Voronkov, Trudy Hidrobiol. 
Stants. Glubokom Oz., vol. 2, 1907, p. 105. 
The body is moderately stout and gibbous dorsally. The head 
is large, strongly oblique anteriorly and slightly deflexed. The neck 
is well marked. The abdomen is arched dorsally and the ventral 
line straight; the lorica is very firm and the plates distinct, over¬ 
hanging the foot. The lateral clefts are rather narrow anteriorly 
and increase gradually in width towards the posterior end. The 
foot is small and broadly conical; the tail is prominent and near 
the end of the foot. The toes are rather short, stout and decurved, 
tapering gradually to acute points; their length is a little less than 
one fifth of the entire length. The foot glands are very small and 
pyriform. 
The corona is strongly oblique and convex with prominent, beak¬ 
like lips. 
The mastax is large and of the normal type; the fulcrum is 
slightly expanded posteriorly, the manubria are short, very slender 
and the ends strongly recurved, but not crutched. The gastric 
glands are fairly large and elongate ovate. 
The ganglion is large and saccate; the large, lens-shaped eyespot 
is at the posterior end. No retrocerebral organ is present. 
Total length 135-140ju; toes 25-28jtx. 
Cephalodella ventripes is widely distributed in weedy ponds, but 
is not usually found in large numbers. It is readily distinguished 
by the overhanging lorica and its large size. 
CEPHALODELLA PHYSALIS Myers, new species. 
Plate XXIX, figures 3-5. 
The body is very short, stout and gibbous dorsally. The head 
is very large and obliquely truncate anteriorly; its length is. less 
than the dorso-ventral depth. The neck is well marked. The ab¬ 
domen is but little longer than wide, somewhat prismatic and 
deepest near mid-length. The lorica is quite firm and the lateral 
cleft is wide. The foot is very short and stout; the tail is small 
and knoblike and near the posterior end of the foot. The toes 
