THE INTESTINAL PROTOZOA OF FROGS AND TOADS. 233 
of eight flagella. How absolutely unwarranted such a change 
is will easily be seen when it is recollected that the genus 
Urophagus was founded by Klebs himself, the first to 
observe eight flagella in the parasitic form. And Klebs 
founded this genus to contain a single species, which differed 
from all the other 8-flagellate organisms in the fact that 
it ingested food at the hind end of the body—an act which 
Moroff never observed. 
The first real attempt to describe the structure of this 
animal was made by Foa, 1904, who also made an attempt to 
assign the correct name to the organism. She says: ‘ Grassi 
(1888) conferma la propria classificazione,”’ and accordingly 
names the parasite Dicercomonas intestinalis (Duj.). 
Now I must point out that this name adopted by Grassi 
and Foa is not available. The genus Dicercomonas was 
founded by Diesing in 1865, and not by Grassi in 1879. 
Diesing’s definition runs as follows: “ Dicercomonas 
Diesing (monadis spec. Perty). Animalcula solitaria libera 
symmetrica. Corpus immutabile, ovale, hyalinum, caudi- 
culis duabus retractilibus, nec ciliatum, nec loricatum. Os 
>] 
terminale. Flagellum unum pone os. Anus : 
Ocellus nullus. Partitio . . . Anodontarum parasita.” 
He then enumerates a single species, Dicercomonas 
succisa Diesing (syn. Monas succisa Perty) found “in 
aqua cum Anodontis putrescentibus.”” It thus appears that 
Grassi’s name must be relinquished, although it is just con- 
ceivable that Diesing really observed a similar organism, for 
Certes (1882) described Hexamita inflata Duj. as occur- 
ring in the oyster. However, we must take Diesing’s defini- 
tion as it stands—as that of a uniflagellate. 
Finally, Kunstler and Gineste, in 1907, described another 
species of “ Giardia,” namely Giardia alata K. et G. from 
tadpoles of a frog. From their description this hardly seems 
10 agree with my observations on the structure of the para- 
site under consideration. On the contrary, the new form 
uppears more closely allied to Lamblia. However, it is just 
1 Not 1856, as given by Stiles. 
