FRESHWATER RHIZOPODS AND HELIOZOA. 323 
30. NEBELA HIPPocREPIS, Leidy, Rhiz. N. Amer. 1879, p. 156, 
t. xxv. ff. 9-14. 
Length of shell 183 4; breadth 1834; breadth of mouth 29 p. 
Amongst wet Sphagnum below the outlet of Llyn Idwal, 
N. Wales. | 
Only one specimen of this rare species was observed, and it 
was an old, empty shell. The digitate processes of the carina 
which pass down into the cavity of the shell are unique and 
unmistakable. It has only previously béen found in New 
Jersey. 
Blochmann suggests that it is the same species as WV. bigibbosa, 
Penard, but on careful comparison the two shells are seen to be 
of quite a different nature, VV. bigibbosa being entirely devoid of 
a keel. A species which may, however, ultimately prove to be 
NV. hippocrepis is NV. galeata, Penard, but Penard’s figures are 
too indistinct for one to form any definite opinion. 
31. NEBELA BARBATA, Lezdy, in Proc. Acad. Nat. Sci. Philad. 
1876, p. 119, f. 8; Hreshw. Rhiz. N. Amer. 1879, p. 159, t. xxiv. 
ff. 14-17. 
Llyn Llydaw, Snowdon, N. Wales. A number of minute 
sand-erains were attached to the shell. Length 1985 breadth 
50 »; length of spines about 15 u. 
Gen. Hrtnopera, Leidy. 
32. Heteorera Picta, Leidy, Freshw. Rhiz. N. Amer. 1879, 
p- 162, t. xxxi. ff. 1-11.—Difflugia sphagni, Leidy, 1874. Nebela 
sphagni, Leidy, 1876. 
Not uncommon in Sphagnum-pools and bogs. Frequently 
met with in the encysted condition. 
33. Hennorera perricona, Leidy, I. c. p. 165, t. xxvi. ff. 12-20. 
A much scarcer species than H. picta. Bog near Widdale 
Beck, N. Yorkshire. Hawkshead, Lancashire. Cap<«l Curig, 
N. Wales. Near Glenties, Co. Donegal, Ireland. Orkney Is. 
Gen. Quapruta, #. H. Schulze. 
34. QuapRULA syMMeEtTRICA, F. H. Schulze, in Archiv fur 
mikr. Anat. 1875, p. 329, t- xvii. ff. 1-6; Archer, in Qu. 
Jour. Mier. Sci. 1877, p. 122.—Difflugia symmetrica, Wallich, 
in Ann. Mag. Nat. Hist. xii. 1864, p. 245. D. assulata, Hhrenb 
1871. 
LINN. JOURN.— ZOOLOGY, VOL. XXVIII. 23 
