THE INTESTINAL PROTOZOA OF FROGS AND TOADS. 245 
in small numbers, in feces of Bufo. The three flagella are 
separated at their origin, and equal inlength. Length about 
6 uw. Movements sluggish. 
4, An organism with six flagella. Several specimens found 
on different occasions in the feces of Bufo vulgaris and 
Rana temporaria. Nucleus spherical, granular, anterior 
in position. Six equally long anteriorly directed flagella. 
No axostyles. Length about 10m (PI. 3, fig. 46.) May 
possibly be a degenerate or developmental form of Octo- 
mitus (ef. p. 241), with which it was always found. 
I may add that I have several times observed the Bodo 
described above undergo a process of degeneration which is 
remarkable for the formation of long, delicate, heliozoon-lke 
pseudopodia. In this radiate condition the animal bears 
some resemblance to the multiciliate creature described in 
frogs by Grassi. According to Schuberg this is really a 
detached epithelium cell, but Grassi denies this. ‘The name 
Grassia ranarum was given to it by Fisch. I regard its 
existence as highly doubtful. 
B. RHIZOPODA. 
(1) Entameba Ranarum Grassi. 
Syn.: “Amoébe” Lieberkiihn, 1854, 
Amceba ranarum n. sp., Grassi, 1879. 
“ Amceba ranarum (?) (mihi) ” Grassi, 1882. 
“ Amobe” Brass, 1885. 
Amceba ranarum (Grassi) Doflein, 1901. 
Entamceba rane Hartmann, 1907. 
Kntamceba ranarum (Grassi) Dobell, 1908. 
The existence of an amceba in the intestine of the frog was 
first pointed out by Lieberkiihn (1854), whose observations, 
as far as they went, were very accurate. He was able to 
distinguish it from leucocytes found in the same place, though 
itis not certain that the amceba which he saw and figured 
