37 6 
Notes. 
and small 1 paranucleoli/ Thus it appears that this body is an arti- 
ficial product, due to the unequal penetration of the fixing medium. 
When this penetrates a nucleus from one side it seems to carry with it 
certain stainable nuclear constituents, until they are stopped by the 
nuclear membrane, against which they heap up. In its staining 
relations this material shows similarity to chromatin perhaps more 
than to nucleolar substance, and is probably a mixture of various 
nuclear constituents. 
J. E. HUMPHREY, 
Weymouth Heights, Mass., U.S.A. 
