340 DISEASE IN WILD MAMMALS AND BIRDS 
faction which is red, mottled, sharply outlined, with a 
suggestion of a capsule and slightly firmer than surround- 
ing organ. ' ' Histological section shows a capsule of very 
noticeable thickness but possibly not much in excess of 
normal. The cortex particularly in its deeper layers is 
much injected and in some places there has been hemor- 
rhagic diffusion. In many places in the zona fasciculata, 
more especially near the periphery, there is breaking up 
of the cell tubes with an infiltration of large round cells 
and some chromatophilic cells. In other places this seems 
to have gone on to fibrous tissue increase and necrosis of 
the cortical fibrous cell types. The connective tissue layer 
below the cortex is wide and the spaces filled with blood. 
This connective tissue also surromids islets of medullary 
cells which are not specially chromatophilic. The mass 
in the medulla is made up of varying sized alveoli sur- 
rounded by rather rare, highly vascularized connective 
tissue and enclosing islets of medullary cells. These 
alveoli may be subdivided by septa. Hemorrhage has 
occurred into many of them. The individual cell masses 
are made up of groups of rather large cells with illy 
defined margin, a granular, opaque but not vacuolated 
protoplasm. They have a bladder-like nucleus in which 
the centrosome is large and prominent. Definite mitotic 
figures could not be found, but mitosis is probably 
present. A few cells with double nuclei were seen and 
one with four. In many of these large islands the centre 
has gone to pieces from hemorrhage or necrosis. Some of 
the vessels are thrombotic and one shows a very pro- 
nounced periarteritis. ' ' A brown cebus (Cebus fatuellus) 
was killed because of a poor tuberculin test chart. His 
organs were negative except the right adrenal body which 
was 3 X 1.5 cm., or four times the size of its fellow. It 
was a tense body with a smooth, mottled, deep yellow 
surface. On section there were deep yellow islands 
separated by pale brownish septa; the structure did not 
