HAGUE: SPERMATOZOA AND SERTOLI CELLS. 133 



each Sertoli cell, and that the cells might not always be com- 

 plete, only the larger numbers were tabulated. The following 

 are the counts : 



11 Sertoli cells with 12 spermatozoa. 

 18 Sertoli cells with 11 spermatozoa. 

 20 Sertoli cells with 10 spermatozoa. 



In another effort to trace Sertoli cells from one section to 

 another, several successive cross sections of tubules of 15-micra 

 sections were outlined, and the groups of spermatozoa were lo- 

 cated and counted. Even though there was no success in trac- 

 ing the cells, there were other results from these counts. Since 

 Sertoli cells are about 50 micra long and 12 micra thick when 

 fully developed, there should be in sections 15 micra thick, some 

 complete cells, or cells with 12 spermatozoa, about equal num- 

 bers of cells with 11 and 1, with 10 and 2, with 9 and 3, with 

 8 and 4, with 7 and 5, and about twice as many with 6 

 spermatozoa, providing there are 12 spermatozoa in each Ser- 

 toli cell. But the following are the numbers in 6 sections : 



14 groups of 1 each. 



26 groups of 2 each. 

 32 groups of 3 each. 

 32 groups of 4 each. 

 57 groups of 5 each. 

 70 groups of 6 each. 

 65 groups of 7 each. 

 35 groups of 8 each. 

 13 groups of 9 each. 



6 groups of 10 each. 



2 groups of 11 each. 



3 groups of 12 each. 



Since this did not give any definite ratio, groups in eight 

 sections 8 micra thick were counted, with the following results : 



29 groups of 1 each. 



24 groups of 2 each. 



27 groups of 3 each. 

 26 groups of 4 each. 

 49 groups of 5 each. 

 44 groups of 6 each. 

 41 groups of 7 each. 

 21 groups of 8 each. 



6 groups of 9 each. 

 3 groups of 10 each. 



group of 11 



1 group of 12 



