474 Wisconsin Academy of Sciences, Arts, and Letters. 
Gosse, Eotifera, 1886, vol. 2, p. 42, pi. 19, fig. 14.— Wierzejski, Eozpr. 
Akad. Umiej., Wydz. Mat.-Przyr., Krakow, ser. 2, vol. 6, 1893, p. 229.— 
Skorikov, Trav. Soc. Nat. Kharkow, vol. 30, 1896, p. 294.— Stenroos, 
Acta Soc. Fauna et Flora Fennica, vol. 17, No. 1, 1898, p. 133. 
Biaschiza taurocepJialus tenua Hilgendorf, Trans. New Zealand Inst., 
vol. 31, 1899, p. 124, pi. 10, fig. 9c-d. 
Diaschiza gracilis Dixon-Nuttall and Freeman, Journ. Eoyal Micr. Soc., 
^1903, p. 10, pi. 1, fig. 4. —Voigt, Forschungsber. Biol. Stat. Plon, vol. 11, 
1904, p. 64. —Voronkov, Trudy Hidrobiol. Stants. Glubokom Oz., vol. 2, 
1907, p. 105. —Von Hofsten, Arkiv Zool., Stockholm, vol. 6, No. 1, 1909, 
p. 50. —Sachse, Siisswasserfauna Deutschlands, pt. 14, 1912, p. 119, fig. 
228. —Barring, Proc. U. S. Nat. Mus., vol. 47, 1913, p. 528. —Montet, 
Eev. Suisse Zool., vol. 23, 1915, p. 330. —Jakubski, Eozpr. Wiad. Muz. 
Dzieduszyckich, vol. 1, No. 3-4, 1915, p. 21. — ^Weber and Montet, Cat. 
Invert. Suisse, pt. 11, 1918, p. 137. 
The body is rather short, laterally compressed and slightly 
gibbous dorsally. The head is relatively short, broad and convex 
anteriorly. The neck is well marked. The abdomen increases 
gradually in width for about two thirds of its length; the posterior 
third is gently rounded; the lorica is thin and flexible, but the 
plates are fairly distinct; the lateral clefts are rather narrow an¬ 
teriorly and increase slightly in width towards the posterior end. 
The foot is conical and rather short; the very small tail is some¬ 
what beyond mid-length. The toes are short, fairly slender, very 
slightly recurved and taper gradually and evenly to acute points; 
their length is about one fifth of the total length. The foot glands 
are moderately large and pyriform. 
The corona is oblique and strongly convex without projecting lips. 
The mastax is fairly large and of the normal type; the fulcrum 
is very slender and slightly recurved posteriorly, but not expanded; 
the manubria are slender, rodlike, decurved at the ends and not 
crutched. The gastric glands are small. 
The ganglion is elongate and saccate; the retrocerebral organ 
is absent and the eyespot frontal. 
Total length 125-130/;t; toes 22-25 /r. 
Cephalodella gracilis is common everywhere in weedy ponds, 
it has a certain resemblance to C. sterea, but is readily distinguished 
by the form of the toes and its much smaller size and stouter body. 
CEPHALODELLA STEREA (Gosse). 
Plate XXVII, figure 6. 
b'urcularia sterea Gosse, Journ. Eoyal Micr. Soc., 1887, p. 864, pi. 14, fig. 8. 
—Hudson and Gosse, Eotifera, Suppl., 1889, p. 25, pi. 31, fig. 15.— 
