INTEGUMENTAL GLANDS OF CROCODILIA 591 



Figure 24 is through the lower part of the gland proper, the 

 only sign of the lumen being a tiny hole, lu, in the center of the 

 gland mass. The strands of cells, st, are seen as about twenty 

 circular or oval areas of varying sizes scattered through the 

 glandular area. One of these strands surrounds the remains of 

 lumen, lu. 



The capsule, cp, sends in strands or irregular septa toward the 

 center of the gland. These strands increase in number as the 

 bottom of the gland is approached. 



The character of the cells of the gland at this stage, as seen 

 under moderately high magnification, is shown in figures 20 and 

 21. The regions of the gland from which these cells w^re drawn 

 are shown by the two circles, 1 and 2, in figure 19. 



In region 1, figure 20, which is just beneath the capsule, cp, most 

 of the cells seen are of moderate size, very irregular in outline 

 (though tending toward the hexagonal form from mutual compres- 

 sion) with moderate-sized, deeply stained nuclei. These cells are 

 separated into groups of irregular sizes and shapes by fine septa 

 of connective tissue which extend in from the capsule. In the 

 edge of -this region is shown the distal, pointed end of one of the 

 radiating groups of cells, st (fig. 19), mentioned above. The 

 cells in this group, while varying greatly in size, are on the 

 average much larger than those just described, in some cases 

 being several times as large. The nuclei are proportionately larger 

 also, and the cell walls are very heavy and sharply defined. 

 The cells at the distal end of the group (toward the capsule) are 

 not very sharply differentiated from surrounding smaller cells, 

 as though they were being developed from these cells. 



In region 2, figure 21, the cells of the radiating strand, st, are 

 sharply differentiated on both sides from the smaller surround- 

 ing cells, and both they and the surrounding cells have the same 

 characteristics as noted above for region 1. 



At this stage, in those sections that passed through a mass of 

 secretion in the lumen of the gland, a sharp line of demarkation 

 is evident between the cells of the gland and those of the secre- 

 tion, which is different from the condition to be noted in the 

 next stage. 



