aoe ELIZABETH CAROLINE CROSBY 
The granule cell layer shows a wide range of types among its 
neurones. The following types, based on a study of Golgi prep- 
arations, have been distingushed among the granule cells of 
the bulb. 
1. Intrinsic or type II cells. These neurones have small 
cell bodies, with dendrites that are short, thorny, and branching, 
and which pass out in every direction from the cell body. No 
axones can be distinguished. These cells are intrinsic neu- 
rones, serving for the correlation of impulses within the layer. 
Some of the smaller stellate cells appear to serve as intrinsic 
neurones, at least so far as can be judged from the material 
studied. 
2. Stellate cells (figs. 27, 28).. These are similar in appear- 
ance to the cells so named by Sheldon in the teleostean olfactory 
bulb. The cell bodies are angular or somewhat star-shaped 
as the name indicates. The dendrites are thick and thorny 
and many branched and extend out towards the periphery of 
the bulb. In the plexiform layer they interlace with the den- 
drites of the mitral cells and of the goblet cells. Some of the 
dendrites extend outward into the glomerular layer but it was 
not determined whether these dendrites actually entered into 
the formation of glémeruli, as Sheldon (’12) found to be the 
case in the teleosts. The axones in many cases form synapses 
with branches of the mitral cell dendrites. Sometimes they 
enter the tractus olfactorius, although they have been followed 
no great distance in it. Some of the smaller stellate cells do not 
send their dendrites outward beyond the cell bodies of the mitral 
cells. Furthermore the axones of such cells often end about 
other cells of the bulb and so serve as intrinsic neurones. 
3. Goblet cells (figs. 25 to 27). These are large, oval cells 
whose dendrites are similar in appearance to those of the stellate 
cells. Sometimes the dendrites of the goblet cells reach the glo- 
merular layer, and have been seen entering into the formation 
of a glomerulus. In other cases, the dendrites of the goblet 
cells do not enter the glomerular layer but are dependent upon 
the mitral cells for their stimulation. The axones of the gob- 
let cells enter the tractus olfactorius, at least in some cases. 
