472 ME. H. SANDON ON PROTOZOA FROM THE 
width from ?>S/x to 66/ji, and with apertures between 15 fi and 24/t wide. 
Two ciliated specimens only were found with the dimensions : length 56/a 
and 65/i, greatest width 33/i and 43/a, and apertures 15/x and 31/i. 
E. tuherculata Duj. occurred in one sample only. The dimensions were : 
length 56/i, greatest width '27/i, aperture 12/x, body-scales (elliptical) 7/i long. 
This is no doubt the E. alveolata found by Penard and Scourfield. 
E. Icevis Perty. — This species was not at all common and most of the 
specimens found were damaged, so that the identification was in many cases 
not very satisfactory. The dimensions of those found in the mosses were : 
length 39;u- to GOfi, greatest width 24/.t to iOfi, and aperture 11/a to 15//.. 
The specimens found in the soils were smaller, some being only 18/4 long. 
Assulina muscorum Greef (^1. minor Penard and A. seminulum (pars) 
Leidy). — Typical specimens varying from 45/i to .54/i in length were abun- 
dant in two of the moss samples from Prince Charles Forehmd; in fact, their 
presence constituted the most striking difference between these mosses and 
those from the other locality. They were also quite numerous in some 
of the soils, but these specimens were rather more variable in size (length 
33/i to 53//.) and in shape, which was frequently asymmetrical. The soil 
specimens were also quite colourless, but as they were all dead it was 
impossible to decide whether this was d\ie to the usual brown' membr.me 
having been destroyed by the soil solution or whether they really belonged 
to a colourless variety. 
Cyphoderia ampulla var. vitnea Wailes.. — Only a few individuals of this 
species were found, and in most cases it was impossible to distinguish the 
structure of the test, which appeared quite homogeneous. In one case, 
however, regular polygonal scales could be detected. The specimens were 
uniformly small, the length varying from 50/i. to o6/a instead of the normal 
100/i to 120 fi (22), with a greatest width of 25 /m to 27/x and an aperture of 
10 /A to 12 fi. The usual yellowish tint was also absent and the tests (which 
were all empty) were perfectly colourless. 
In each of three moss samples a single specimen of a larger yellowish 
retort-shaped test was found. Two of these measured 75/t in length and the 
third was nearly 170/t. These tests showed no trace of any structure and 
were all flexible, being in fact dented and creased when found. The section 
appeared to be circular, but it was impossible to be quite certain of this 
owing to the damage that they had suffered. Thej' probably belonged to the 
species Campascus triqueter Penard, which is confined elsewhere to hikes of 
glacial origin and is consequently regarded (24) as a relict of a true arctic 
fauna. The occurrence therefore of this otherwise lacustrine form in arctic 
mosses is of particular interest, and it is unfortunate that no undamaged 
specimens were found. 
Trinema. — T. encliehjs Ehrenb. and 1. linear e Penard were both quite 
connnon, though the former species was not recorded from Prince Charles 
