486 Wisconsin Academy of Sciences, Arts, and Letters. 
The ganglion is elongate and saccate; no retrocerebral organ 
is present. The eyespot is at the extreme posterior end of the 
ganglion. 
Total length 125/*; toes 33/>t. 
Cephalodella strigosa is not common; we have found it in weedy 
ponds and among submerged sphagnum in Vilas County, Wiscon¬ 
sin, and around Atlantic City, New Jersey. There is a slide of 
this species in the U. S. National Museum, mounted by C. F. 
Rousselet and according to the label collected in Epping Forest; 
it is erroneously determined as Diaschiza derhyi Dixon-Nuttall 
and Freeman. This is probably the nearest relative of C. strigosa, 
but differs in having recurved toes. 
CEPHALODELLA TANTILLA Myers, new species. 
Plate XXX, figure 2. 
The body is moderately elongate, laterally compressed and 
strongly gibbous dorsally. The head is large and slightly deflexed. 
The neck is not very strongly marked. The abdomen increases 
gradually in width for two thirds of its length and is somewhat 
abruptly rounded posteriorly; the lorica is firm and the plates 
well marked. The lateral clefts are rather narrow anteriorly and 
increase gradually in width towards the posterior ends, which are 
somewhat flaring. The foot is short and broad; the fairly promi¬ 
nent tail is a little beyond mid-length. The toes are wide apart 
at the base, long, slender and recurved, tapering gradually from 
the base to acute points; their length is about one third of the total 
length. The foot glands are small and pyriform. 
The corona is oblique and strongly convex without projecting 
lips. 
The mastax is relatively large and of the normal type; the 
fulcrum is very stout and slightly expanded at the extreme end, 
the manubria very slender, rodshaped and recurved, but not 
crutched. The gastric glands are rather small. 
The ganglion is long and saccate; no retrocerebral organ is pres¬ 
ent. The eyespot is at the posterior end of the ganglion. 
Total length 115~120/x; toes 38-40/a. 
Cephalodella tantilla is common in weedy ponds with soft, 
acid water; we have collected it in Vilas and Oneida Counties, 
Wisconsin, around Atlantic City, New Jersey, and in Polk County, 
