OURAM@BA VORAX. 85 
as long as the ordinary length of the animal, about 
the middle often with a slight groove-like constriction, 
or narrowing, their thin ends terminating abruptly. 
Nine out of ten specimens in his gathering exhibited 
these appendages. 
Professor Lankester (loc. cit.) abolishes Leidy’s 
specific name, and unites this organism with Ameba 
villosa, under the title of Ourameba villosa. In his 
Amwba nobilis (which may be a form of Ourumaba 
Leidy) Penard mentions the occurrence of similar 
caudal filaments, which he regards as parasitic (‘ Fauna 
Rhiz. du Bass. du Léman,’ p. 66). 
Leidy describes another form allied to O. voraw, 
namely Q. botulicauda, much smaller than 0. vorae, 
“colourless, transparent, with an irregularly-angular 
outline.” The caudal appendages in this case consist 
of from two to nine “ acutely-divergent, segmented 
filaments of variable length.” 
Family 2. REricunosa. 
Naked protoplasts belonging in part to the homo- 
geneous and assumed non-nucleated Monera of Haeckel. 
Body sub-spherical or elongated; the pseudopodia 
branching out into exceedingly slender filaments, which 
anastomose, and form, in some species, a widely-spread 
net-work. 
SYNOPSIS OF THE GENERA. 
Body colourless, sub-spherical or oval, changing but 
slightly in contour; the pseudopodal filaments few 
and widely extending. 7. Gymnophrys. 
Body during active movement much elongated, 
forming filamentous branching and anastomosing 
pseudopodia at various points, but mainly at the ex- 
tremities. 8. Bromyen. 
