FRESHWATER RHIZOPODS AND HELIOZOA. 339 
Order CHALAROTHORACA. 
Gen. PompHonyxorunrys, Archer. 
64. POMPHOLYXOPHRYS PUNICEA, Archer, in Qu. Jour. Mier. 
Sez. ix. 1869, p. 386, t. xvi. £. 45; x. 1870, p. 105, t. xvi. f. 4.— 
Hyalolampe fenestrata, Greeff, in Archiv fiir mikr. Anat. 1869, v. 
p- 501, t. xxvi. f. 387; Hertwig 5 Lesser, 1. c. 1874, x. Suppl. 
p. 221. 
Wicken Fen, Cambridge ; abundant among Chara hispida and 
Utricularia vulgaris, in peaty pools and ditches. Diameter of 
body about 44 y. Pseudopodia few, radiating, and without 
granules. All the animals exhibited a rather quick gliding 
motion through the water. The body-protoplasm contained a 
peculiar red pigment and sometimes a small amount of chloro- 
phyll, the latter perhaps obtained in the food. The globules 
of the enveloping skeleton were from 2-38 , in diameter. 
Hampsfell, Lancashire ; scarce among Myriophyllum in pools. 
The examples were inactive and possessed few pseudopodia. 
Several large vacuoles were observed in one individual. The 
siliceous globules were 3°2-4 » in diameter. 
N. Wales:—Among Sphagnum in a pool near Llyn Teyrn, 
Snowdon ;, Moel Siabod; Capel Curig; Glyder Fach, abundant 
in pools at 2200 ft. 
Gen. RuapnHipioPurys, Archer. 
65. RwapHIpIoPHRys PALLIDA, F. 4. Schulze, in Archiv fiir 
mikr. Anat. 1874, x. p. 377, t. xxvi.f. 1. 
Small forms with zoochlorellids; diameter of body about 
42 p. 
Llyn Idwal, N. Wales, among Jsoétes. (Pl. 30. fig. 35.) 
Although the forms noticed from N. Wales possess chlorophyll- 
bodies, I think they should be referred rather to R. pallida, 
Schulze, than to R. viridis, Archer. All the examples seen were 
solitary, and they possessed several contractile vacuoles, two 
characters which distinguish the former species from the latter. 
Moreover, the outer coat was colourless and the pseudopodia 
were ornamented with granules as in &. pallida. Schulze, in his 
description of R. pallida, mentions some larger, pale, shining 
corpuscles in the body-protoplasm, corresponding in size and 
LINN. JOURN.—ZOOLOGY, VOL. XXVIII, 24, 
