312 MR. G. 8. WEST ON SOME BRITISH 
quarters.” Curiously enough, the collection in which I observed 
what I take to be the animal described by Cienkowski contained 
large numbers of a Gromia. 
Order TESTACEA. 
Fam. ARCELLINA. 
Gen. Cocuuioropium, Hertwig & Lesser. 
9. CocuLiorpopium sBiLiMBosuM, Leidy, Freshw. Rhiz. N. 
Amer. 1879, p. 184, t. xxxii. ff. 1-25.—Ameeba bilimbosa, 
Auerbach, 1856. Cochliopodium pellucidum, Hertwig § Lesser, 
in Archiv fir mikr. Anat. 1874, x. Suppl. p. 66, t. 11. f. 7. 
I find this animal to be somewhat scarce. Ihave only obtained 
really good examples of it from five localities, viz.:—near Brigg, 
Lincolnshire; near Lough Neagh, Ireland; near Gortahork, 
Co. Donegal, Ireland; Llyn Ogwen, and the lakes at Capel 
Curig, N. Wales. 
Diameter of shell 32-44 p. 
10. CocHLIOPODIUM MINUTUM, sp. un. (PI. 28. figs. 6-10.) 
Very minute, with a cup-shaped delicate shell having an 
extremely wide mouth. Body-protoplasm granular ; pseudopodia 
somewhat irregular, usually attenuated at the extremity. 
Nucleus absent. One or two vacuoles present in some indi- 
viduals, but entirely absent in others. 
Diameter of shell 12°4-13°5 p. 
Llyn-y-cwm-ffynon, N. Wales. 
This small Cochliopodium was observed in abundance among 
numerous Desmids in washings of Zsoétes. The shell is very 
delicate, with a widely open mouth, and is structureless: it is 
also flexible, assuming various unsymmetrical shapes as it accom- 
modates itself to the animal’s movements. Seen from above the 
shell is usually circular, but it frequently exhibits an irregularly 
undulate margin. 
The pseudopodia are commonly somewhat flattened extensions 
of colourless ectoplasm with distinctly attenuated ends. Some- 
times they are flat, sheet-like expansions of irregular outline, 
which now and then fuse together, forming a bell-shaped ring of 
ectoplasm extending outwards from the edges of the mouth. 
In all cases they are colourless, byaline projections showing 
no trace of any granulation. The animals, when active, extend 
