280 BOTANICAL GAZETTE [ocroBEer 
by the position of the continuous line g in the figure. ~Beyond 
that line basidia line the passages. At 7, 7, 7, medullary 
masses may be seen crossed by the line; these masses lie par- 
tially in the gleba and partially in the column. In their glebal 
portion they. bear a layer of basidia; on the ends in the column 
they are covered with the cortical tissue. It is by such connect 
ing medullary masses that the gleba hangs suspended within the 
cavity of the receptaculum after elongation of the latter. 
In the same figure (fg. 6) many medullary masses (¢) may 
be seen in the column not connected with the other masses to 
the right. These unconnected masses are in general smaller 
toward the edge of the cortical plate (C’) and, in some stages, 
they are more closely surrounded by the adhering cortical tissue 
than are the masses ata greater distance from the edge of the 
plate. Ed. Fischer has described the occurrence of such isolated 
masses,> which he calls hyphal knots (Hyphenknduel) in Clathrus 
cancellatus, and has concluded that they arise from the differ- 
entiation of the tissue of the cortical plates.° In this opinion I 
cannot concur. As already stated, my preparations show that a 
continuous cavity is first formed between the edges of the 
cortical plates and the medullary tissue. Hyphe from the one 
side of this cavity grow into it. Along the opposite side of the 
cavity branching masses of medullary tissue extend into the 
cavity, partially filling it and causing its irregularity in form. 
Such medullary masses are represented by the dark areas in figs 
70-13. They are highly gelatinous, having the same microscople 
structure as that of the gelatinous layer of the volva and the 
main central mass of medullary tissue, and they take the samé 
orange-red stain in my preparations. Figs. 1o-z3, in the order 
of their numbering, represent serial cross-sections, of which fig: 
ro is of the section at the lower end of the series, oF nearest 
the base of the egg. They are from below the level of the gleba. 
The examination of such a series of cross-sections affords reasoP 
sLbid. 5, figs. 3 and 4. 
6 hy A . 
Fischer calls this tissue LZwischengeflecht. Ut is, however, 
tissue from that to which he applies the same name in the Phallex. 
a wholly different 
