88 BRITISH FRESHWATER LHIZOPODA. 
forms are met with which seem to emit pseudopodia 
only at opposite poles of the oval body, as Cienkowski, 
and likewise Penard, figure it. The filaments are not, 
in any case, numerous. The body of the animal is 
always pale; the pseudopodal threads are extremely 
fine and transparent, divergent and widely spreading, 
their branches anastomosing. No developmental pro- 
cess has yet been detected in Gymnophrys. Two 
individuals which were under observation at one time 
came into actual contact, but they did not incorporate, 
nor was there any blending of their pseudopodia. 
Genus 8. BIOMYXA Leidy, 1875. 
Biomyweu Lerpy in Proc. Acad. Nat. Sci. Phil. 1875, p. 124. 
Body consisting of finely-granular protoplasm, semi- 
fluid and colourless; initial form sub-spherical; the 
body capable of much elongation, and branching out 
into a network of fine anastomosing filaments, which 
are generally massed at the extremities, but may also 
emanate from different points of the surface. 
From Gymunophrys this genus is distinguished by the 
habit of the body to elongate, and of the finer pseudo- 
podia to become massed at the extremities, whilst from 
Penurdia the pale colourless endoplasm clearly marks 
it off. From the latter it is further separated by 
general habit (bemg purely a chlorophyl feeder) and 
by its more dilatory movements. 
1. Biomyxa vagans Leidy. 
(Plate VIII, figs. 3 and 4.) 
Bismyea vagans Luipy in Proc. Acad. Nat. Sci. Phil. 1875, 
p. 125, and Freshw. Rhiz. N. Amer. (1879), p. 281, 
t. xlvn, ff. 5-12; t. xlvin, ff. 8, 12 (7); Corrapo in Boll. 
scient. I, an. 2 (1880), p. 47; Griverrys & Hunrrey, 
Micr. Dict. ed. 4 (1883), p. 98; Gruber in Nova Acta 
Acad, Caes. Leop. XLVI (1884), p. 503, t. ix, ff. 27-31; 
Bovron in Mid]. Nat. 1X (1886), p. 174; Wurenrver in 
