ig. 14. 
JENNINGS. — Asplanchna, 
PLATE 2. 
Four-cell stage, viewed as a transparent object from the animal pole. 
The anterior end is above, 
Four-cell stage, later than Figure 8, seen from the right side. Spindles 
in C? and D’; spherical nucleus in 33, 
Four-cell stage, optical section through the cells B? and 13, showing the 
division of the asters in preparation for the third cleavage. 
Five-cell stage, from the ventral side. The anterior end is above. The 
aster in dt1-has divided laterally, the two parts being still connected. 
Spindles in 43, 53, and C8 seen endwise. 
Optical section, approximately sagittal, through the quadrants B and D, 
from the egg shown in Figure 11. 
Oblique view of the eight-cell stage, shortly after the third cleavage. 
The animal pole is marked by the polar cell; the anterior median 
line by the boundary between quadrants A and B. 
Dorsal view of the egg represented in Figure 13, showing the oblique 
position of the asters in d*?, and the lateral extension of the aster 
in c#2, 
Ventral view of the egg seen in Figures 13 and 14, showing the oblique 
position of the asters in d*!, and the lateral extension of the aster 
in c*1, 
Optical, nearly sagittal, section of the eight-cell stage, through the quad- 
rants B and D, showing the dorso-ventral direction of the spindles in 
d^! and d. Notice also the change of form of the quadrant B, as 
compared with the same quadrant in Figures 10 and 12. 
