28 Mr. H. J. Carter on Freshwater Rhizopoda 
Obs. Annexed to the figure of this in my journal is the fol- 
lowing note (Sept. 1855) :—“ There are two Diffugie [in the 
island of Bombay], viz. one small, ovoid, almost colourless, and 
about =1,th of an inch in length; test covered with grains of 
quartz-sand, sometimes with particles or bodies of equal length 
laid side by side in regular arrangement, as in Arcella aculeata, 
Ehr. Conjugates like Euglypha; flesh shrinks up into a round 
form at the bottom of the test. [This is probably the species 
which I have called D. tricuspis, 1. c. pl. 7. fig. 80.] The other 
much larger,” &c. [This is the species last described. ] 
Attached to the figure of another ovo-globose specimen (in 
my journal), covered with hyaline grains of quartz, but not 
brown, is also this note (July 1855), viz.:—“A large Difflugia, 
with sandy test, translucent, and about =th of an inch long.” 
The last measurement probably equals that of any English spe- 
cies of Difflugia; and as the same shape is often figured in my 
Bombay journal, although of much smaller dimensions than 
this, it is probable that they all belong to the “ ovo-globuse” 
species of this locality, of which the maximum size is that just 
mentioned. The habitat is fresh water. If thought desirable, 
it might be named “ D. oveglobosa.” 
Difflugia elliptica, nu. sp. PI. I. fig. 26. 
Test ovo-elliptic, compressed, pointed posteriorly, truncated 
anteriorly, with even aperture; composed of hyaline grains of 
quartz. No part of the animal seen but the pseudopodia, which 
were digitate and obtuse. 
Hab. Fresh water. 
Size. =1;th of an inch long, and =4;th transversely on the 
broad surface. 
Loc. Island of Bombay. 
Obs. I haye only one specimen of this form figured. It dif- 
fers from D. compressa in having the posterior part of the test 
pointed, and the anterior part without extended neck ; hence I 
have designated it differently; but, as “one swallow does not 
make a summer,” so one specimen is not enough to establish a 
species, and therefore the name may be considered provisional. 
Difflugia peltigeracea, n. sp. PI. I. fig. 12. 
Test flask-shaped, transparent, with wide mouth and double 
inflation, viz. one in the body, and the other towards the aper- 
ture ; composed of minute, irregular, polygonal scales in juxta- 
position. Animal colourless ; nucleus posterior. 
Hab. Found about Peltigera canina (Dog-Lichen). 
Size. Length =4,th, greatest breadth ;+,th, aperture 54th 
of an inch. 
Loc. Tavistock, Devon. 
