Conard: Structure of Simblum Sphaerocephalum 273 
Km, gleba-chamber. 
PI, plate-like partition in volva-jelly. 
Pi, branches of central strand. 
P, cavity of arm of receptaculum (gelatinous). 
P/>, receptaculum. 
S, central strand of gelatinizing hyphae. 
Tr, trama-plates. 
X, peridium. 
y, rhizomorph. 
a, lowest ring of receptaculum. 
tp, basidial layer (hymenium). 
Plate XCVI 
1. Longitudinal section of nearly mature egg, measuring 2.35' cm. X 2.15 
cm. Camera sketch. 
2. Transverse section of egg through stalk, showing the partitions in the 
volva-jelly. Camera sketch. 
3. Folded pseudoparenchyma tissues in longitudinal section of stalk in egg 
stage. The cavity of the stalk is on the right. S', and the volva-jelly (G) on 
the left. Camera sketch. 
4. Basidium, from a microtome section. Camera drawing. 
5. Mature Simblum 5 cm. tall. Camera sketch of alcoholic specimen. 
6. Transverse section of halved egg, through middle of head. Camera 
sketch. 
7. Cells of pseudoparenchyma of stalk from egg stage ; camera drawing. 
8. Cells of pseudoparenchyma of stalk teased out from a fully elongated 
specimen ; camera drawing with same magnification as fig. 7. 
9. Section of receptaculum arm and gleba ; semi-diagrammatic camera 
sketch. From (g) in fig. 12. 
10. Transverse section of pseudoparenchyma of arm of receptaculum, 
showing rudimentary gleba-chamber (/). Tramal tissue below (Tr) and cavity 
of arm (R) above. Camera drawing. 
Plate XCVII. Photomicrographs 
11. Transverse section of head of egg stage. 
12. Portion of the same section, more highly magnified. 
Grinnell College, 
Grinnell, Iowa. 
