240 AT. M. Stevens 



Description of Figures 



Fig. 38 Another anaphase, showing the lagging chromosome {xn). (H2) 



Fig. 39 Daughter anaphase plates, xi and a:2 the heterochromosomes. (Hi) 



Fig. 40 Daughter plates. (Hi) 



Fig. 41 a-c. Second spermatocyte equatorial plates, containing 11, 12 and 13 chromosomes respec- 

 tively. (Hi) 



Fig. 31 d-g. Second spermatocyte equatorial plates. The smallest chromosome in d, / and g and 

 the two small ones in ? may mean precocious division of x^- (E2) 



Fig. 42 Early anaphase of second mitosis. (E2) 



Fig. 43 Daughter anaphase plates of second mitosis. (H2) 



Fig. 44-46 Lagging chromosomes (i) occasionally seen in second maturation mitoses. (Hi) 



Fig. 47d and b Young (spermatids from same cyst and same section (thionin staining), showing 

 larger and smaller heterochromosome.) (H,) 



Fig. 48 a and t. Similar figures of older spermatids. -(Hi) 



