170 
OROFFRKY SMITH. 
Fig. 9. — Spermatogenesis in hybrid A. 9 a. First maturation divi- 
sions, showing irregular and imequal chromosomes scattered on mitotic 
spindle. 9 b. Resting spermatids of double normal size. 9 c. Elonga- 
ting spermatids of double size. 
Fig. 10. — Spermatogenesis in hybrid B. 10 a. First maturation 
divisions. 10 b. A number of highly abnormal doi^ble-sized spermatids, 
some of which are being atypically converted into deformed sperma- 
tozoa. 
Fig. 11. — Spermatogenesis in hybrid C. 11a. Two first maturation 
divisions. 11 ?). Five resting spermatids of double nonnal size, but 
otherwise normal. 11 c. Three elongated spermatids of doulde normal 
size, but structually fairly normal. 11 d. Three highly abnormal 
spermatids in process of conversion into atypical and deformed sperma- 
tozoa. 
