212 Farmer and Digby.—Cy to logical Features of Hybrid Ferns. 
Fig. 28. Slightly later stage. Again the spindle cone is relatively inconspicuous, x 2250. 
Fig. 29. Superficial view of a quadripolar heterotype spindle. Many of the fibres are in con¬ 
nexion with granules, x 2250. 
Fig- 30. Formation of an irregular heterotype spindle, x 2250. 
Fig. 31. Quadripolar heterotype spindle. Only three limbs are seen, the fourth lies in the next 
section, x 2250. 
Fig. 32. Typical heterotype spindle of this plant, showing the large collection of chromosomes 
at the equator, and the smaller groups at either pole. The spindle fibres are few. x 2250. 
Fig. 33. Aberrant heterotype nuclear division, x 2250. 
Fig. 34. Aberrant heterotype nuclear division, but somewhat later stages ; the chromosomes are 
swelling and losing their sharpness. The axis joining the two nuclei is not in the focal plane, hence 
the apparent breadth of the tubular connexion, x 2250. 
Fig. 35. Second meiotic division of a fairly normal character, which is of rare occurrence in 
P. Schneideri. Note the ‘droplets’ and the belated chromosomes, x 2250. 
