THE EFFECTS OF HVPERTOXIO SOLUTIONS. 
47y 
sea-water -|- 9'5 c.c. 2h M. NaCl for half an hour. The chromatin is 
entirely degenerated, hut the asters are normal. [Magnification oc. 2, 
objective i.] 
Fig. 32 . — Late anaphase of an egg of E. esculentus treated with 
.50 c.c. sea-water + 20 c.c. 2i M. NaCl for fifteen minutes. One 
chromosome has been eliminated. 
Figs. 33 and 37 A. — Two sections of a segmenting egg treated witli 
50 c.c. sea-water + 20 c.c. 2i m. NaCl for half an hour. The cytoplasm 
shows signs of cytolysis and the centrosomes are contracted. [Magni- 
fication oc. 2, objective i.] 
PLATE 26. 
Figs. 34-61. 
Figs. 34-50. — Nuclear figures from eggs of E. acutus which had 
been treated with 50 c.c. sea-water H- 6 c.c. of 21 M. NaCl for half 
an hour. 
Fig. 34. — Fused male and female pronucleus showing no vesicles. 
Fig. 35.— Nucleus in same phase as fig. 34, but with vesicles. 
Fig. 36. — Prophase showing four vesicles. 
Fig. 37. — Metaphase showing seven vesicular elements. 
Fig. 38. — Metaphase showing six vesicles, the shape of some indicate 
their origin from the chromosomes. 
Fig. 39. — Metaphase showing five vesicles. 
Fig. 40. — Anai^hase showing two vesicles omitted, and one included in 
each chromosome group. 
Fig. 41.— Anaphase showing three omitted vesicles. 
Fig. 42. — Anaphase showing four omitted vesicles and one included 
in one of the chromosome groups. 
Fig. 43. — Anaphase in face showing four vesicles. 
Fig. 44. — Telophase showing omitted and included vesicles. 
Fig. 45. — Telophase sliowing omitted and included vesicles. 
Fig. 46. — Two daughter-nuclei of the first segmentations division 
showing small vesicles. 
Fig. 47. — Individual vesicles. Each horizontal line shows the vesicles 
from a single nucleus. [Magnification oc. 4, objective y.j.] The 
lowest vesicle a^jpears to show its origin from two elements. 
Fig. 48. — Tripolar figure (lu'ophase) showing seven vesicles. 
Figs. 49 and 50. — Two aberrant nuclei from this series of eggs. 
