1897 | LHE PHALLOIDEL OF THE UNITED STATES 85 
the progress of elongation. The function of the volva is more 
probably one of protection of the parts it incloses in the egg- 
stage. 
3. During the progress of elongation and coincident with the 
disappearance of the abundant store of glycogen found by 
Errera in and about the receptaculum, there is a very rapid and 
general growth in size of the cells of pseudoparenchyma consti- 
tuting its walls. The bursting forth of the receptaculum from 
the volva and the straightening of its folded walls are due to 
such process of growth of the pseudoparenchyma, during which 
the cells at the angles of the folds grow somewhat more spher- 
ical and so become to some extent presumably active agents in 
the process of elongation. 
ACCOUNT OF EXPERIMENTS 6—9, WITH MEASUREMENTS OF PSEUDO- 
PARENCHYMA. 
Notre.—In the tabulated lists of measurements made in these 
experiments both the long and short diameters of subspherical 
or ellipsoidal cells are given. The measurement first given in 
such cases is in a general direction transversely across the parti- 
tion wall. For each of such cells one-half the sum of its long 
and short diameters has been taken as the approximately aver- 
age diameter for use in computing the general averages. This 
average diameter is given in parenthesis. 
The side of a wall forming a part of the outer surface of the 
Stipe is marked (az); the side forming a part of the surface of 
the main central cavity of the stipe is marked (c). 
Experiment 6.— A strong egg just beginning elongation was 
divided longitudinally into halves at 3:00 pP.M., October 8. 
Longitudinal radial sections were cut free-hand from the wall of 
the Stipe of one of the halves. These sections were placed ina 
drop of water on a slide and measurements were immediately 
made of the cells of pseudoparenchyma in strips across the par- 
tition walls which make up the wall of the stipe. These meas- 
urements are given in the column on the left below. The other 
half of the egg was suspended in the supporting apparatus in a 
