FRESHWATER RHIZOPODS AND IELIOZOA. 321 
Form with a five-lobed mouth observed from near Sedbergh, 
W. Yorkshire. These specimens were very much larger than 
any previously recorded. 
Gen. Lecquerrvsia, Schlumberger. 
25. LECQUEREUSIA SPIRALIS, Blochmann, Die mikr. Thierwelt 
des Susswass., 1. Protozoa, Hamburg, 1895, p. 17.—Difflugia 
spiralis, Hhrenb. 1840; <Abhand. Akad. Wiss. Berlin, 1871, 
p- 274, t. ii. ff. 25-27; Pritch. Infus. 1861, p. 558. Lecque- 
reusia jurassica, Schlumb. in Ann. Sez. Nat. 1845, p. 255. Difflugia 
Helix, Cohn, in Zeitschr. f. wissensch. Zool. 1853, p. 261. 
Generally distributed and abundant. The amount of coiling 
of the shell and the nature of the materials composing it vary 
considerably. The forms possessing a shell composed entirely of 
sand-grains are somewhat rare. 
Gen. Neseta, Leidy. 
26. NeBeLa coLuaris, Leidy, Freshw. Rhiz. N. Amer. 1879, 
p-. 145, t. xxi; t. xxii. ff. 1-7; t. xxiv. ff. 11, 12.—Difflugia 
collaris, Hhrenb. Monatsh. Akad. Wiss. Berlin, 1848, p. 218. 
D. peltigeracea, Carter, in Ann. Mag. Nat. Hist. xiii. 1864, 
t.1. f. 12. D. symmetrica, Wallich, in Ann. Mag. Nat. Hist. 
xill. 1864, t. xvi. ff. 27-33. Nebela militaris, Penard, in Mém. 
Soc. Phys. et d@ Hist. Nat. Geneve, tom. xxxi. no. 2, 1890, p. 164, 
t. vil. ff. 16-22. 
Widely distributed, especially in Sphagnum-bogs. Up to 
2000 ft. on Glyder Fach, and 2700 ft. on Glyder Fawr, 
N. Wales. In Sphagnum-pools, Orkney Is. 
Var. LAGENIFORMIS.—JlV. lageniformis, Penard, |. c. p. 158, 
t. vi. ff. 50-61. WV. ambigua, Cash, in Trans. Manchester Micr. 
Oy IUGSIL. 0s Uy Us 906 385 11700 
This variety is distinguished by its more elegant outline and 
prominent neck. In habit, structure of shell, ete. it is precisely 
similar to typical VV. collaris. Length of shell 115-123 » ; breadth 
of shell 63-70 »; breadth of mouth 25-27 p. 
A less frequent form than the type, and one which I have only 
obtained in quantity from pools on Penyghent, W. Yorkshire, 
and from Capel Curig, N. Wales. 
