426 E. A BAUMGARTNER 
Fig. 28 Transverse section of the floor and a gland of the anterior lobe of an 
adult. X 400. s, sinusoid. 
eral zone of cytoplasm which is very finely granular and con- 
trary to the statement of Tilney, it is acidophilic. Haller 
observed that the peripheral zone of cytoplasm in Mustelus 
stained intensively with borax carmine and Stendell stated that 
the peripheral layer of cells # acidophilic. Sterzi (09) found 
that the cytoplasm of the cells in the floor of the caudal part of. 
the rostral lobe is not granular. However, there are glandular 
outgrowths here in some adults and these walls have the same 
character as the other glandular parts, except in the mid-ventral 
line where no outgrowths are found, and here the wall is com- 
posed of low epithelial cells. The nuclei are oval and crowded 
nearer the inner free surface. They have a finely granular 
chromatic network. The roof of the anterior lobe is also com- 
posed of several layers of cells. If no glands are present, the 
nuclei here are very irregularly placed, some of them lying parallel 
to the surface along the inner free side, others being placed at 
various angles to the surfaces. The cytoplasm is very scant. 
The roof comes into close relation with the overlying brain, but 
a thin connective tissue layer containing small blood vessels and 
capillaries separates them. One cannot speak of a fusion of the 
roof of this lobe with the brain tissue above, as noted by Tilney. 
