292 BOTANICAL GAZETTE [OCTOBER 
Fic. 1. Median longitudinal section of the youngest egg. X 60. 
Fic. 2. Cross-section of an egg in the same stage of development as that 
of fig. 7. 
FiG. 3. Cross-section of a slightly older egg, in which differentiation of 
the gelatinous masses of the volva has just begun. _It is doubtful whether this 
would give rise to three such masses or to four, in the former case with a 
receptaculum having three columns alternating with the masses, or in the 
latter to one with four. X 60. 
Fig. 4. Cross-section of an egg in a still older stage, with four masses 
(G) forming the gelatinous layer of the volva. The four columns of the 
receptaculum arise in the angles between these masses along the inneredges 
of the cortical plate (C’). x 60 : 
Fig. 5. Portion of a still older egg in cross-section, showing an early 
stage in the formation of a cavity between the cortical plate (C ') and the 
deep-lying medullary portion (¢). One column of the receptaculum arises in 
a part of each such cavity; the hymenium arises along the surfaces of the 
remaining part. X 60. 
Fic. 6. The same region of the egg shown in fig. 5, but in a more 
advanced stage. The column is now developing. The sharp continuous 
line, g, has been drawn to more clearly set off the column from the gleba. 
At the places marked +, », r, medullary masses connect the tissue of the 
chambers of the receptaculum with the tramal tissue of the gleba. X 34 
Fig. 7. Cross-section of a fundament of a column of the receptaculum, 
showing medullary connections of the chamber tissue towards the right 
cortical connections of the pseudoparenchyma towards the left. X 34- 
Fic. 8. Portion of the wall, Z, of fig. 7, more highly magnified. x 670. 
FIG. 9. Portion of the wall, , between the gleba (G/) and a chamber mass 
(6) of fig. 7. X 325. 
FIGS. 10-13. Serial sections of chamber-masses of a column sia 
adjacent tissues, in the lower part of the egg. Fig. ro represents the ene 
section. The series shows how the small and apparently isolated massé® 
(“hyphal knots”) are in reality connected with the main medullary mass 
106. 
Fic. 14. Median longitudinal section through an egg in which i - 
tion of the receptaculum is beginning. Shows a column in longitudina’ * 
tion displaying its relations to other structures. x 6. 7 
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