468 
MR. H. SANDON ON PROTOZOA. FROM THE 
observations of its cytology have been made. The hind end of the body 
often contains a considerable number of granules, apparently the remains 
of food, though the actual ingestion of bacteria has not been observed. The 
movements are very similar to those of Allantion, the long flagellum being 
applied closely to the glass slide, and the whole animal gliding quickly and 
steadily forwards. When the short second flagellum was visible it moved 
vi 0-0 rously from side to side, but its movements were not sufficiently powerful 
to impart any vibration to the animal as a whole. The characteristic 
quiescence in a newly-prepared slide, noted in the case of Sainouron oxu 
(p. 460), is shown to an even more marked degree by this species, as much as 
ten minutes sometimes elapsing before movements are resumed. If the drop 
of culture fluid is spread out on a slide but not covered with a coverslip, 
activity recommences much more quickly. 
Fig. 6. 
Fia. 5. 
Sp. €. 
2. Ciliata. 
None of these require any comment except Uronema sp., which was found 
in soil sample 5 (1921). The numerous specimens found appeared identical 
with those obtained in cultures of sea-weeds from Plymouth, and it is 
possible that they were really marine organisms introduced into the soil in 
the droppings of sea-birds. Unfortunately at the time I was not aware of 
Schewiakoff's and Buddenbrock's (8) woi-k on this genus, and not having 
made drawings, cannot say whether the organisms found were U. mari- 
nuin Duj. or the very similar species L'. scheiviakofii Buddenbrock, which 
appears to be a true fresh-water form. 
3. Rhizopoda. 
Amoiha Umax. — The identification of the diff'erent species of "limax" amcebffi 
is usually only practicable when the complete life-history is known, or at 
least when both the active and the encysted stages are available. In the 
