kK 
MINUTE STRUCTURE OF PELOMYXA PALUSTRIS. 295 
Notes on the Minute Structure of Pelomyxa 
palustris (Greeff). 
By 
Lilian J. Gould, 
Hall Scholar, Somerville Hall, Oxford. 
With Plates 20 and 21. 
Waite working as a student in the laboratory of the Linacre 
Professor at Oxford, during the summer term of 1893, the 
opportunity was given me of examining a considerable number 
of specimens of the interesting fresh-water Rhizopod Pelomyxa 
palustris, originally described by Professor Greeff in 1867 as 
Pelobius, and later discussed by him under its present name 
in the ‘ Archiv fiir mikroscopische Anatomie,’ Bd. x, 1874. I 
was enabled, by the kindness of Professor Lankester (to whom 
my best thanks are due for affording me the material for these 
observations, as well as for much valuable advice and assist- 
ance), to study more than twenty individuals of P. palustris, 
both in the living state and by means of sections. 
Some points with regard to the minute structure which I was 
able to make out have not, as far as | am aware, been observed 
before, and others which had been doubtful have received 
confirmation. It has therefore seemed desirable to bring 
forward the results of my observations, as far as they go, with 
the conclusions I have drawn from them, although one or two 
of these conclusions must be regarded merely as inferences 
until verified by further investigation. Most of the sections 
were cut by the skilled hand of my friend Mr. EH. A. Minchin, 
B.A. (to whom I am much indebted for his kind help), and 
