PLATE 1 



EXPLANATION OF FIGURES 



All drawings in this plate were taken from the testis of Anolis carolinensis. 

 1 to 3 Are spermatogonia! equatorial plates. The letters refer to chromo- 

 somes which can be identified. 



4 A very young first spermatocyte, showing two nucleoli. 



5 Diplotene stage, showing X-chromosome. 



6 Early prophase of the first division, showing tetrads. 



7 and 8 Equatorial plates of the first division. 



9 to 12 Side views of the first division spindle, showing the X-chromosome 

 passing undivided to one pole of the cell. 



320 



