368 Burt. — The Development of 
Ed. Fischer’s paper of two years later treats the process as 
one of turgescence h 
Summary. 
In its earliest recognizable stage, the egg consists of the 
cortical and medullary tissues of the mycelial strand, con- 
tinued directly upward from the strand. Of these tissues, 
the medullary bundle spreads out at its upper end and 
forms a dense sheaf-like head by repeated branching and 
anastomosing. 
The cortical layer of tissue becomes the outer wall of the 
volva ; the sheaf-like head gradually differentiates into all 
the other parts of the older egg. 
In such differentiation the central column R is the first to 
be set off, arising from the axial tissue of the head and from 
below upward. 
Formation of the gelatinous layer G of the volva now 
begins in the periphery of the head. The dense portion 
between the peripheral zone and the central column R be- 
comes looser in its inner and lower parts about the column, 
there forming the intermediate tissue A, but remains dense 
in its upper and outer portions, forming a compact dome- 
shaped mass. In these changes the direct connexions from the 
original medullary bundle N to the dense dome-shaped mass 
and to the lateral portions of the sheaf-like head disappear, 
while indirect connexions by way of the central column 
R are retained, and become of apparently great functional 
importance. 
Along the inner surface of the dense zone and next to the 
intermediate tissue A , the rudiment of the gleba H arises 
from the clustered swollen ends of lateral branches of the 
tramal tissue. These hyphal ends take position in a palisade- 
layer facing the intermediate tissue. By the crowding in 
1 Bemerkungen iiber den Streckungsvorgang des Phalloideenreceptaculums. 
Mittheil. d. Naturf.-Ges. in Bern, 1887, p. 142. 
