Fig. 44. 
Fig. 45. 
Fig. 46. 
Fig. 47. 
Fig. 48. 
Fig. 51. 
Fig. 52. 
JENNINGS, — Asplanchna, 
PLATE 6. 
Right side of the egg shown in Figure 48, Plate 5, 27-cell stage. 
Dorsal pole of the egg shown in Figures 43 and 44. 
Posterior view of the egg shown in the three preceding figures. Note 
the lateral position of the asters in di-. 
Right anterior surface of an egg, showing the quadrants B and C in the 
sixth generation. 
Sagittal optical section of the 82-cell stage, viewed from the right side, 
and showing the spindles in de and di.. 
Sagittal optical section of an egg slightly older than that seen in Figure 
49, showing the process by which the cell d^? is formed at the sixth 
cleavage of the entoderm. 
Sagittal optical section of an egg a little older than that seen in Figure 
49, showing the recently divided and separating asters in d'1, and 
the beginning of migration of the cloud of granules which lies at the 
anterior ventral margin of the cell 4. 
Sagittal optical section of about the same stage as that shown in Figure 
50. The nucleus of d has moved away from the periphery of the 
cell, and the cloud of granules is distributed between it and the small 
cells d^? and di.. 
Apparently there is some slight variation in regard to the changes 
in the entoderm cell as compared with the other cells. From the 
condition of the remaining cells of the D quadrant, one would infer 
that Figure 51 is younger than Figure 50, though the migration of 
the eloud of granules is more advanced. 
Transverse optical section of the egg shown in Figure 51, through the 
region marked in Figure 51 by the cell d. The section is viewed 
from the ventral side. 
