284 BOTANICAL GAZETTE [ OCTOBER 
that the basidia have with the tramal tissue, and should also 
project from the chamber surface. perpendicularly outward into 
the cavity between the chamber masses. 
Advanced stages —A median longitudinal section through an 
old egg is givenin fig. rg. The section is also median with 
respect to the columns of the receptaculum, one of which is 
shown on the right. The beginning of elongation of the recep- . 
taculum has torn the glebal mass away from the lower part of 
the medullary mass. Near the upper end of the column, along 
its inner side, many more openings show in the wall than further 
down toward the base. Through these openings the medullary 
tissue passes into the chambers and firmly attaches the gleba to 
this portion of the receptaculum. The figure shows how in the 
mature stage the ball of glebal tissue comes to be suspended 
from the under side of the apex of the receptaculum. 
A more important point presented by fig. zg is the manner 1 
which the cortical and medullary systems of tissues are dovetailed 
together in the receptaculum. From the left an originally com 
tinuous mass of medullary tissue sends branches towards the 
right; from the right an almost continuous mass of pseudo- 
parenchyma sends branches towards the left, filling in all space 
between the first set of branches. 
This section does not show many of the openings in the wall 
near the base of the receptaculum, through which the medullary 
hyphz pass into the lower chambers. Openings of that nature 
do, however, exist, although they are not so numerous there ® 
higher up. One such passage into a chamber is shown om the 
left side of the figure. 
REFERENCE TO ANTHURUS BOREALIS BURT. 
In my account of the structure and development of Anthurus 
borealis, one of the Clathrez, it was shown that cortical plates 
extend from the base of the egg upward almost to the ape 
and inward from the cortical layer to the receptaculum. In the 
region below the level of the base of the arms, the inner edges 
of the plates are united into one cylindrical mass which forms 2 
