472 Wisco7isin Academy of Sciences, Arts, and Letters. 
evenly to very acute points. The foot glands are very small and 
pyriform. 
The corona is only slightly oblique, but strongly convex and 
without projecting lips. 
The mastax is moderately large and of the typical form; the 
fulcrum is slender and slightly recurved at the posterior end; the 
manubria are crutched. The gastric glands are elongate pyriform, 
the obtuse end forward. 
The ganglion is very long and saccate; the retrocerebral organ 
is absent and the eyespot frontal and double, the two pigment 
spheres fairly wide apart. 
Total length 105-115/a; toes 21-25/a. 
Cephalodella elongata is not common; we find it occasionally in 
weedy ponds and sphagnum bogs around Atlantic City, New Jersey. 
It is readily recognized by the very slender body, as well as the 
pyriform gastric glands. 
CEPHALODELLA GIBBA (Ehrenljerg). 
Plate XXX, figures 4-6. 
Furcularia gib'ba Ehrenberg, Abh. Akad. Wiss. Berlin (for 1831), 1832, 
p. 130, pi. 4, fig. 16; Infusionsthierchen, 1838, p. 420, pi. 48, fig. 3.— 
Gosse, Phil. Trans. Eoyal Soe. London, vol. 146, 1856, p. 433, pi. 17, figs. 
35-37.— Eckstein, Zeitschr. Wiss. Zool., vol. 39, 1883, p. 374.— Hudson 
and Gosse, Eotifera, 1886, vol. 2, p. 43, pi. 19, fig. 13.— Tessin, Arch. 
Naturg. Mecklenburg, vol. 43, 1890, p. 150.— ^Wierzejski, Eozpr. Akad. 
Umiej., Wydz. Mat.-Przyr., Krakow, ser. 2, vol. 6, 1893, p. 230.— 
Kertesz, Budapest Eotat. Faun., 1894, p. 31.— Skorikov, Trav. Soc. Nat. 
Kharkow, vol. 30, 1896, p. 294.— Stenroos, Acta Soc. Fauna et Flora 
Fennica, vol. 17, No. 1, 1898, p. 133. 
Plagiognatha felis Dujardin, Hist. Nat. Zooph., Inf., 1841, p. 652, pi. 18, 
fig. 3; not Vorticella felis Muller. 
BiascMza semiaperta Gosse, in Hudson and Gosse, Eotifera, 1886, vol. 2, 
p. 80, pi. 22, fig. 10.— Bilfinger, Jahresh. Ver. Naturk. Wiirttemberg, 
vol. 48, 1892, p. 116; ibid., vol. 50, 1894, p. 54.— Wierzejski, Eozpr. 
Akad. Umiej., Wydz. Mat.-Przyr., Krakow, ser. 2, vol. 6, 1893, p. 237.— 
Kertesz, Budapest Eotat. Faun., 1894, p. 35.— Levander, Acta Soc. 
Fauna et Flora Fennica, vol. 12, No, 3, 1895, p. 44.— Stenroos, Acta Soc. 
Fauna et Flora Fennica, 17, No. 1, 1898, p. 155.— Weber, Eev. Suisse 
Zool., vol. 5, 1898, p. 551, pi. 21, figs. 1-3.— EunnstrOM, Zool. Anz., vol. 
34, 1909, p. 270.— ^Lie-Pettersen, Bergens Mus. Aarbog (for 1909), 
1910, No. 15, p. 59.— Mola, Ann. Biol. Lac., vol. 6, 1913, p. 255. 
BiascMza gihba Dixon-Nuttall and Freeman, Journ. Royal Micr. Soc., 
1903, p. 6, pi. 1, fig. 1.— Voigt, Forschungsber. Biol. Stat. Plon, vol. 11, 
1904, p. 63.— Voronkov, Trudy Hidrobiol. Slants. Glubokom Oz., vol. 2, 
