406 Wm. s. Marshall and C. T. Vorhies, 



wliere the tunica has been slightly pulled away. In most sections the 

 mass of secretion has shrunken away from the gland, leaving its inner 

 surface slightly roughened. Each cell is then without an inner mem- 

 brane, which is found either attached to the outer surface of the secre- 

 tion or part way between it and the gland. This inner membrane is 

 not shown in most of the figures. The secretion, which is very darkly 

 colored by the violet of the triple stain, has generally a light brownish 

 border of varying thickness („couche corticale ou grès" of Gilson [5J), 

 connecting the inner surface of the gland with the dark secretion. It 

 also shows a slight granular structure. In many specimens it contains 

 va:cuoles having a definite arrangement, and others scattered irregularly 

 throughout its central portion. 



The nucleus has a distinct membrane which, in the normal glands, 

 appears equally clear in all parts. The large nucléoles are numerous 

 and present a fairly regular appearance in their arrangement. Sections 

 of the nucleus show great variation in size and in the number of enclo- 

 sed nucléoles, both, of which, from the shape of the nucleus, we would 

 naturally expect. Both in surface view and in sections the nucléoles 

 show comparatively few great irregularities in size; their surfaces are 

 rounded and fairly regular and without the angles or projections so 

 noticeable in the active glands. In the wide ends of the nuclei the 

 nucléoles show a tendency to have a more rounded appearance than 

 in the narrower parts, where they become elongated. In a few of the 

 normal glands some of the nucléoles contained vacuoles. 



The chromatin granules were very numerous and their distribution 

 in the nucleus fairly regular. They showed, however, a tendency to 

 form groups leaving the intervening spaces free; they often formed 

 rows of two to six granules which extended from the nuclear mem- 

 brane to one of the nucléoles. Similar strands, although shorter, 

 were also observed passing from one nucléole towards or to another. 

 In the figures of other authors the chromatin granules are much more 

 numerous than as represented by us. This is, we think, due to our 

 thinner sections, in none of which were these granules observed to 

 nearly fill all of the space between the nucléoles, as has been figured 

 by others. The presence of a linin reticulum is in many preparations 



