THE INTESTINAL PROTOZOA OF FROGS AND TOADS. 235 
3. Octomitus intestinalis Prowazek, also in rats (the 
broad form). . 
Hence I can now sum up the nomenclature, and will then 
proceed to a consideration of the organism itself. The name 
stands as follows: 
OcTOMITUS DUJARDINI nom. nov. 
Syn.: 
? 
“ww 
Coy) 
rob) 
Cie‘) 
iow) 
Bodo intestinalis Ehrenberg, 1838. 
Hexamita intestinalis Dujardin, 1841. 
Bodo (Amphimonas) decipiens Diesing, 1850. 
Bodo (Khrbg.) Burnett, 1851. 
Cercomonas ranarum Perty, 1852. 
Bodo intestinalis (Khrbg.) Leidy, 1856. 
Amphimonas intestinalis Diesing, 1865. 
Hexamita intestinalis (Duj.) Stein, 1878. 
Dicercomonas (Monomorphus) ranarum 
Grassi, 1879. 
Hexamita ranarum (Duj.) Grassi, 1879. 
Hexamita intestinalis (Duj.) Kent, 1880. 
Bodo intestinalis (Ehrbe.) Kent, 1880. 
Dicercomonas intestinalis (Duj.)Grassi,1882. 
Giardia agilis Kunstler, 1882. 
Hexamitus intestinalis (Duj.) Biitschli, 1884. 
Hexamitus intestinalis (Duj.) Seligo, 1885. 
Dicercomonas intestinalis (Duj.) Grassi, 1888. 
Hexamitus intestinalis (Duj.) Klebs, 1892. 
Hexamitus intestinalis (Duj.) Senn, 1900. 
Hexamitus intestinalis (Duj.) Doflein, 1901. 
Hexamita intestinalis (Duj.) Stiles, 1902. 
Urophagus intestinalis (Duj.) Moroff, 1903. 
Dicercomonas intestinalis (Duj.) Foa, 1904. 
Giardia alata Kunstler et Gineste, 1907. 
Octomitus sp. Dobell, 1908. 
Structure.—The general shape of Octomitus dujar- 
dini is fusiform or elongate oval (see Pl. 3, figs. 29, 31). An 
average adult individual measures about 10 in length. The 
nucleus and the organellee connected with it present a consider- 
