CLARK: CYTOLOGY OF CARCINOMA. 221 



Cell Nest 11. This nest was probably one-half of a half 

 necrotic alveolus. A sketch of it in cell nest 11 A is given in 

 figure 9. The cross-hatched area shows that part of the nest 

 that is necrotic, while the white border about it is the area of 

 the cells counted. 



Cell Nest 11, A. 



Tier. 1 2 3 A 5 6 7 8 9 10 11 Av. D.D. I.D. Cells. 



Direct D. . 2 . 1 2.6 3 



Indirect D. . 1 . 2 3.3 3 334 



Cell Nest 11, B. 



Direct D. . 3 . 1 . 3 . 1 . 1 . . 5.1 9 



Indirect D. 2 . 1 1.6 . . 3 305 



Cell Nest 11, C. 



Direct D. ... 1 1 3 . 1 5.8 6 



Indirect D. 1 4 . 1 . 1 2.7 . . 7 279 



Cell Nest 11, D. 



Direct D. 1 . 2 1 1 2 1 4.3 8 



Indirect D. 1 2 1 2.0 . . 4 296 



Cell Nest 11, E. 



Direct D. . 1 1 . 2 . . . 1 ... 4.8 5 



Indirect D. 1 1 . 1 1 3.0 . . 4 279 



Cell Nest 11, F. 



Direct D. . . 1 . 1 . 1 . . 1 . . 6.2 4 



Indirect D. 2 . 2 . . 3 3.7 . . 7 271 



Cell Nest 11, G. 



Direct D. . 2 1 1 3 . . 1 1 1 . . 5.3 10 



Indirect D. 3 1 . . 1 2.0 . . 5 404 



Cell Nest 11, H. 



Direct D. . 2 2 1 . . 1 . 1 . . . . 4.2 7 



Indirect D. . 3 1 1 1 3.0 . . 6 391 



Cell Nest 11, 1. 



Direct D. . . 2 . 2 2 . . 1 1 . . 5.8 8 



Indirect D. .3122.1 3.6 .. 9 393 



Cell Nest 11, J. 



Direct D. . 1 .... 2 5.3 3 



Indirect D. 1.13 1 3.5 .. 6 306 



No. of cells. Direct divisions. Indirect divisions. 



3258 63 54 



Percentage of cells in divisions 3.59 



" of cells in direct divisions 1.90 



" of cells in indirect divisions 1.60 



" of divisions which are direct 53.80 



" of divisions which are indirect 46.10 



The direct divisions in this nest averaged 2.1 rows farther 

 away from the free edge of the nest than the indirect, or 2.1 

 rows nearer the center of the nest. 



