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 Diffluffice [in the 

 island of Bombay], viz. one small, ovoid, almost colourless, and 

 about -g-^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, I. c. pi. 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 -^Vth of an inch long.^^ 



The last measurement probably equals that of any English spe- 

 cies of Diflugia ; and as the same shape is often figui-ed in my 

 Bombay journal, although of much smaller dimensions than 

 this, it is probable that they all belong to the "ovo-globose'' 

 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. ovoglobosa." 



Difflugia elliptica, n. sp. PI. I. fig. 36. 



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, -g^-oth of an inch long, and Trrtli transversely on the 

 broad surface. 



Loc. Island of Bombay. 



Obs. I have 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. 13. 



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 -aiyth, greatest breadth -rro^^i aperture -girtt 

 of an inch. 



Loc. Tavistock, Devon. 



