494 Wisconsin Academy of Sciences^ Arts^ and Letters. 
its width, and obliquely truncate anteriorly. The neck is well 
marked. The abdomen increases gradually and considerably in 
width for about three fourths of its length; the dorsal line curves 
rapidly downward in the posterior fourth. The lorica is very thin 
and flexible and the edges of the plates rather difficult to trace; the 
lateral clefts are very narrow anteriorly and increase gradually in 
width towards the posterior end. The foot is long and conical and 
the tail prominent. The toes are fairly long and slender, enlarged 
at the base, parallel-sided for about four fifths of their length, de- 
curved and end in small conical points, prolonged by a fairly long, 
bristle-like nib, continuing the line of the dorsal edge; their length 
is about' one fourth of the total length. The foot glands are fairly 
large and pyriform. 
The corona is oblique, strongly convex and without projecting 
lips. 
The mastax is moderately large and of the normal type; the ful¬ 
crum curves upwards at the posterior end; the manubria are not 
crutched. Symbiotic zoochlorellae are present in abundance in the 
walls oT the stomach. The bladder is very large. 
The ganglion is long and saccate; eyespot and retrocerebral 
organ are absent. 
Total length 130-145ja; toes 28-32/x. 
Cephalodella melia was originally collected in soft, acid water 
ponds and bogs in the neighborhood of Atlantic City, New Jersey; 
it has not been seen for two years, but was until then fairly com¬ 
mon. Its nearest relative is probably C. neliiis, from which it is 
readily distinguished by the form and length of the toes and the 
shorter and strongly gibbous body, as well as by the presence of 
zoochlorellae. 
CEPHALODELLA MEGALOCEPHALA (Glasscott). 
Plate XXXII, figures 5-7. 
i Pleurotrocha leptura Ehrenberg, Abh. Akad. Wiss. Berlin (for 1831), 
1832, p. 129, pi. 4, fig. 18; Infusionsthierchen, 1838, p. 419, pi. 48, fig. 2. 
? Hudson and Gosse, Eotifera, 1886, vol. 2, p. 20, pi. 18, fig. 4.— 
? Voigt, Siisswasserfauna Deutschlands, pt. 14, 1912, p. 86, fig. 149. 
? Furcularia lactistes Gosse, Journ. Koyal Micr. Soc., 1887, p. 863, pi. 14, 
fig. 5.— Hudson and Gosse, Eotifera, SuppL, 1889, p. 25, pi. 31, fig. 13. 
Furcularia megalocephala Glasscott, Proc. Eoyal Dublin Soc., new ser., vol. 8, 
1893, p. 56, pi. 4, fig. 3. 
