1899] THE COMPOUND OOSPHERE OF ALBUGO BLITI 243 
Fig. $9. An intercalary oogonium, slightly older condition than fg. 58, 
cytoplasm distinctly in masses, nuclei in early prophase, antheridial tube just 
entering bearing no nuclei, a haustorium at extreme right. 
PLATE XII. 
Magnification in figs. 60, 67, 62, 63, 64, 65, 68, 69, 70, 72, 1500 diameters ; 
nfigs. 66, 67,77, 3300 diameters; in fig. 77, 2200 diameters. 
FiG, 60. Nuclei in metaphase, protoplasm massed in a few centers, 
spindles very clear and brilliant (stain hematoxylin from material fixed in 
Flemming’s agent), 
Fig. 61. Nuclei in late prophase, the protoplasmic masses coalesced to 
form one, vacuoles mark the juncture last made, a few nuclei not yet floated out. 
Fig. 62. Nuclei approaching metaphase, spindles much elongated, all not 
yet extruded from the central region, mitosis in the antheridium, antheridial 
tube shown at its typical position for this stage. 
Fic. 63. Diagram of disposition of oil drops in an oogonium of the con- 
ftion shown in fig. 65 (zonation). 
. Fic. 64. Nuclei nearly at metaphase, zonation almost complete, oil-like 
drop to the tight in ooplasm, antheridial tube present showing no nuclei. 
Fic. 65, Zonation : nuclei near metaphase, ooplasm sharply differentiated, 
plasm (stained by hematoxylin from Flemming material). See also fig. 64. 
‘ 66. Shows spindle in metaphase lying across the film between 
and periplasm, 
*i6. 67. Nucleus in anaphase directly across the boundary film of the 
: » also half of a late anaphase cut diagonally. 
; — » 69. Consecutive sections of an oogonium just after the division 
by * *) showing the position and shape of the antheridial tube. 7g. 
we, the cenocentrum which had just passed its maximum development 
fig. 72). 
a> Tey. = a: ; 
a eal tube and differentiating oosphere, oosphere nuclet 
- itd shows *§.74 was taken from an adjacent section of the same oogonium 
. the ccenocentrum, 
IG, 
— Panded aC letely developed ccenocentrum, the central globule sur- 
Wi thes ree regions of differentiated protoplasm. Froma stage of zona- 
Fe about “nuclei were in anaphase (as in fig. 67) and the daughter nuclei 
to pass into the ooplasm. 
Fig, —w 
Be 72. Diagram of distribution of oil at the stage shown in fig. 79- 
malt 4 Antheridium and tube of the age shown in fig. 79 showing 
: é ; 
* Contents; Z, film; 9, one of the female nuclei; f, periplasm; 
’ Fepresented also in Plate XT, figs. 31, 32. 
