Harring & Myers—Rotifer Fauna of Wisconsin — II. 511 
The mastax is of the normal type of the genus; the inner edge^ 
of the rami are finely denticulate; the fulcrum is slightly expanded 
posteriorly and the rami are crutched. 
The ganglion is large and saccate; there is a small retrocerebrai 
sac, curving over the posterior end of the ganglion; the duct ap¬ 
proaches the corona, but does not quite reach it. There is no 
eyespot. 
Total length 265-275/x; toes 120-125ja; trophi 36/x. 
Cephalodella mucronata is not rare in weedy, soft-water ponds; 
we have collected it in Vilas and Oneida Counties, Wisconsin, 
around Atlantic City, New Jersey, and in Polk County, Florida. 
It was first found by the late James Murray in preserved material 
brought home from New Zealand; the contracted specimens, one 
of which he sent to us, were believed by him to be Monommata 
appendiculata Stenroos. 
CEPHALODELLA PARASITICA (Jennings). 
Plate XXXVI, figure 6. 
Pleurotrocha constricta Jennings, Bull. Michigan Fish Comm., No. 3, 1894, 
p. 14; not Pleurotrocha constricta Ehrenberg. 
Pleurotrocha parasitica Jennings, Bull. U. S. Pish Comm., vol. 19 (for 
1899), 1900, p. 84, pi. 16, figs. 13, 14.— Be Beauchamp, Bull. Soc. Zool. 
France, vol. 30, 1905, p. 117, figs. 1, 2; Arch. Zool. Exper., ser. 4, vol. 10, 
1909, p. 202. 
Piaschiza parasitica Harking, Bull. 81 U. S. Nat. Mus., 1913, p. 34. 
The body is fairly slender, distinctly curved and gibbous dor- 
sally. The head is unusually long and tapers from the neck towards 
the corona. The neck is well marked. The abdomen increases grad¬ 
ually in width for about two thirds of its length and from this 
point tapers rapidly to the base of the foot. The integument is 
very flexible and there is no trace of the usual fissured lorica. The 
foot is short and conical, its base somewhat smaller than the pos¬ 
terior end of the abdomen; the tail is rudimentary. The toes are 
very slightly decurved; the anterior half is nearly cylindric and 
the posterior tapers gradually to acute points; their length is about 
one sixth of the total length. The foot glands are minute and 
virtually atrophied. 
The corona is strongly oblique and without projecting lips. 
The mastax is large and the trophi of normal type; two large 
salivary glands are attached to its posterior end. 
