Katharine Foot and E. C. Strobell Salt 
Or 
Puoto. 12. Same stage as Photo. 11. In this preparation both the daughter 
eccentric chromosomes are equally retarded in reaching the poles. 
Puotos. 13 To 18. Telophases of first division, showing 10 chromosomes at 
each pole, and the daughter eccentric chromosome in its characteristic 
position outside the ring, and in nearly all the preparations this chromosome 
shows the transverse furrow. In all the groups, the interesting duplication 
of the form and arrangement of the chromosomes at both poles is clearly 
brought out. 
PuHotos. 19 AND 20. Prophases of second spindle. All the chromosomes in 
these preparations have the dyad form, typical of this stage. Compare with 
the tetrads of the first spindle prophase. 
PuHotos. 21 AND 22. Metaphases of second spindle. The isolated chromo- 
some on the extreme right of Photo. 22, which we identify as probably the 
eccentric, shows a clear transverse furrow, and a like furrow or constriction 
is demonstrated in all the chromosomes of both these preparations. 
PuHoTos. 23, 24, AND 25. Three anaphases of second spindle. Although the 
chromosomes in these preparations are closely grouped, the division of all 
the chromosomes is plainly indicated—the end chromosomes in each prepa- 
ration showing the line of division very clearly. 
PuHotTos. 26 AND 27. A late anaphase, of second division. The eccentric 
chromosome can be identified at the left of each group and in both prepara- 
tions shows a transverse furrow. 
PuoTo. 28. Telophase of second spindle after the division of the eccentric 
chromosome which can be identified by its typical position outside the 
circle. 
PuHortos. 29, 30, AND 31. Another series of preparations demonstrating the 
division of the lagging chromosome. In Photo. 29 every chromosome is in 
evidence and the dyad form of the lagging chromosome is so marked it might 
almost be claimed as a demonstration of its division. In Photo. 30 the actual 
division of the lagging chromosome is shown and in Photo. 31 the complete 
separation of the daughter halves is demonstrated. 
PuHoToS. 32 TO 39. Hight telophases of second spindles, all of them showing 
the eccentric chromosome ready to divide, though its division is retarded. 
In Photos. 35, 36, 38, and 39, the dyad form of the lagging chromosome is 
shown. Compare these preparations with telophases of first spindle shown 
in Photos. 6, 7, and 5. In Photos. 32, 33, and 34, we see the eccentric chromo- 
some gradually turning to take the position necessary for its transverse 
division—this position is reached in Photo. 35, p. 298. 
Puotos. 40, 41, anp 42. Telophases of second spindle showing the poles 
more widely separated, but in each preparation the lagging chromosome is 
attached to the poles by a delicate fiber, plainly visible in the preparation and 
clearly brought out in at least two of the photographs. The pointed ends 
of the lagging chromosome indicate that the daughter halves are being pulled 
apart, p. 298. 
