10 BRITISH FRESHWATER RHIZOPODA. 
3. Ameba vespertilio Penard. 
(Plate LVIII, fig. 2; Pl. LIX, figs. 1-3.) 
Ameba proteus 
Lerpy (pars) Freshw. Rhiz. N. Amer. (1879), p. 48, pl. iv, ff. 22-24. 
Ameba vespertilio : . 
PENARD in Rev. Suisse Zool. IX (1901), p. 237; Faune Rhiz. Léman 
(1902), pp. 92-95, 7 figs.; Sarcodinés in Cat. Invert. Suisse (1905), 
p. 22. 
Brown in Naturalist, 1910, p. 91; in Jyn. Linn. Soe., Zool. XXX 
(1910), p. 361. 
Waites & Prnarp in Proc. R. Irish Acad. XX XI, txv (1911), p.14. 
Waites in Naturalist, 1913, p. 145; in Jrn. Linn. Soc., Zool. XX XIT 
(1912), p. 123. 
Body usually ovoid or elongated without any caudal 
appendage; pseudopodia conical, comparatively short, 
connected at the base by web-like expansions of the 
ectoplasm; plasma colourless, containing numerous 
granules and food-particles; nucleus single, spherical, 
‘containing a single large nucleole; contractile vesicles 
from one to three in number; numerous small vacuoles 
also often present. 
Length 60-100 p. 
Habitat.—Ponds and submerged vegetation. Com- 
mon. 
ENnGLanp.—Cumberland, Westmorland, Lancashire, 
and Yorkshire (Brown); Shropshire. 
Scornanp.—Ayrshire and Wigtonshire (Brown). 
Irsranp.—Achill Isl., Clare Isl., Inishturk, Mayo. 
The character of the pseudopodia usually serves to 
distinguish this species with facility, their palmate 
appearance resembling a bat’s wing or the webbed 
foot of a bird; rarely, longer and attenuated pseudo- 
podia are formed, but when the animal begins to move 
they resume their characteristic aspect. 
4+. Amoeba verrucosa var. papyracea (Penard) 
var. nov. 
(Plate LVIL, fig. 3.) 
Ameba verrucosa 
EHRENBERG (pars) Infus. (1838), p. 126, pl. viii, f. xi (8). 
