262 



REDUCTION OF THE CHROMOSOMES 



resting period ; and I do not think that even the observations of 

 Flemming ('97), who has published the fullest evidence in the case, 

 completely establish the occurrence of a subsequent longitudinal divi- 



Fig. 131. — (Compare Fig. 27). Maturation-divisions in Salamandra. [£ from FLEMMING, 

 the others from Meves.] 



A. First division in metaphase, showing heterotype rings. B. Anaphase; longitudinal split- 

 ting of the daughter-loops. C. Telophase. D. Ensuing pause. E. Early prophase of second 

 division with longitudinally divided segmented spireme. F. Later prophase. G. Metaphase of 

 second division. 



sion of the chromosomes in the second mitosis. In DesmognatJuis, 

 however, where the resting stage is less complete, Kingsbury ('99) 

 finds the longitudinal split in the persistent chromosomes of the 



