30 BRITISH FRESHWATER RHIZOPODA. 
Australia. Clathrulina eleqaus is mach more abundant 
in the waters of Pennsylvania than with us, and Lec- 
quereusia spiralis 18 as common in swampy places in the 
Far West, and in New South Wales, as in the Sphag- 
num-bogs of Britain. The Difflugias, Hyalosphenias, 
Nebelas, and Heleoperas, the crystalline Quadriula vul- 
garis, the Euglyphas, and many others, occur in equal 
abundance on both sides of the Atlantic. 
The Rhizopoda inhabit ponds and lakes, marshes and 
swamps; wherever, in fact, enough moisture exists 
to support a tuft of moss. They are plentiful in still 
pools, on submerged vegetation, and in the surtace- 
ooze of ponds and ditches. At pond-sides, among the 
stems of sub-ayuatic Hypna, about the roots of Par- 
trans fortuna and Anlacomnium palustre, they may at 
all times be found. Moist dripping rocks in sub-Alpine 
districts and near the coast, in tufts of Parbulu and 
similar mosses; and the walls of aqueducts, where 
frequently there is a percolation of water through 
crevices of the masonry, sometimes yield the very rare 
species. They nestle in the foliage of mosses and 
hverworts, and among the masses of Conferva and 
other lowly vegetation which affect such situations. 
The Rhizopoda in these localities are not infrequently 
associated with such diatoms as Campylodiscus clipeus 
and Asterionella formosa, besides numerous Desmidian 
forms. Difilugia constrictu, D. globulosi, and often 
D. avenula, with some forms of Arcella, find sufficient 
moisture to sustain life im tufts of moss growing on the 
trunks of trees and about their roots in shady woods. 
Various Amahe, Pelomyva, and most of the Arcelle, 
as well as Difflugix, are commonly found in ponds and 
ditches, and creeping about the foliage of aquatic 
vegetation, where they feed upon desmids, diatoms, 
and Algee of various kinds. The flocculent matter 
which invests the finely-civided leaves of Ceratophyllum, 
Mtriculavia, and the aquatic Rawimenli, harbours a great 
variety of Rhizopod life; and some special and vare 
kinds, such as shweha pilosa, should be sought for in 
