FRESHWATER RHIZOPODS AND HELIOZOA. 309 
Class RHIZOPODA,. 
Order AMGBEA. 
Fam. Lozposa. 
Gen. Amara, Hhrenb. 
1. Ama@Ba PROTEUS, Leidy, in Proc. Acad. Nat. Sci. Philad. 
1878, p. 99; Freshw. Rhiz. N. Amer. 1879, p. 81, t. i. ff. 1-8, 
t. 1. ff. 1-13.—Volvox proteus, Pallas, 1766. Ameeba princeps, 
Ehrenb. Abhandl. Akad. Wiss. Berlin, 1831, pp. 28, 79; Infus. 
1838, p. 126, t. viii. f. x. 
Generally distributed; small forms most abundant. Some 
very large specimens were obtained from amongst Utricularia 
minor at Cocket Moss, near Giggleswick, W. Yorkshire. They 
possessed a very large elliptical nucleus, and were mostly gorged 
with Diatoms and Desmids. 
2. AM@BA viLLosa, Wallich, in Ann. Mag. Nat. Hist. 1863, 
xi. p. 287, t. vill.; p. 366, t.ix.; p. 434, t. x. ff. 5-9.—A. princeps, 
‘Carter, in Ann. Mag. Nat. Hist. 1863, xii. pp. 80, 44, t. iii. ff. 1-8. 
Trichameeba hirta, Fromontel. 
Ina back-water of the R. Aire at “Seven Arches,” near Bingley, 
W. Yorkshire, this species was in enormous abundance. The 
muddy bottom of the shallow water was covered with a thick 
black slime consisting entirely of A. villosa. 
3. AMa@Ba vERRUCOSA, Hhrenb. Infus. 1838, p. 126, t. viii. 
f. xi; Carter, in Ann. Mag. Nat. Hist. 1857, xx. p. 37, t. 1. ff.12, 
13.—A. natans, Perty, 1852. A. quadrilineata, Carter, 1856. 
Thecameeba quadripartita, Fromontel. 
A very abundant and widely distributed species. I obtained 
it in quantity amongst mosses at over 3000 ft. elevation on 
Snowdon, N. Wales. 
Gen. Pretomyxa, Greeff: 
4, PrLomyxa PaLustrRis, Greeff, in Archiv fur mikr. Anat. 
1870, x. pp. 51-72, t. ii1.-v. 
Length of animals approximately 500 p. 
Amongst Sphagnum in very stagnant water in a bog above the 
lakes at Capel Curig, N. Wales. oe 
