224 ^- ^- Steven' 



Description of Figures 



rig. 44 Second spermatocyte; condition of the nucleus when tlie sister cells separate. Ac-c. 



Fig. 45 Second spermatocyte; sister cells in later stage; a optical section through center of nucleus, 

 b surface section of nucleus, chromosomes distributed over the nuclear membrane. Ac-c. 



Fig. 46 Prophase of second maturation mitosis showing chromosomes already divided longitudinally 

 Ac-c. 



Fig. 47 Metaphase of second division, — chromosomes always tangled. Ac-c. 



Figs. 48 and 49. Anaphases, Fig. 49 much flattened. Ac-c. 



Fig. 50 Telophase. 



Fig. 51 The smaller pair of chromosomes in prophase, a - d from sections of first spermatocytes, 

 e from a spermatogonium. 



Fig. 52 The smaller pair of chromosomes in metaphase and metakinesis of the first maturation mito- 

 sis, from sections. 



