314 



THEOPHILUS S. PAINTER 



interesting genetic possibilities in the resulting zygotes. The 

 widespread occurrence of syncytial masses among mammals 

 and birds where the same condition must exist makes the obser- 

 vation of some interest. 



Text figure 6 A, B, -and C. Syncytial masses, 

 tozoa in process of formation. 



D and E show giant sperma- 



5. Giant sperm 



An additional feature in lizard spermatogenesis is the occur- 

 rence of giant spermatozoa. These are rare, but when found are 

 very conspicuous. In text figure 6, D, two such giant sperma- 

 tozoa and a spermatozoon of normal size are seen in the process 

 of formation. It will be noted that the giant size affects not 

 only the nucleus, but also the achromatic element. In figure 



