The Boolean class wraps a value of the primitive type boolean in an object.
They then must be considered as representing an extremely primitive type of mankind, and it is necessary to look far afield for their prehistoric home.
The Hertwigs when they discovered the endoderm-lamella showed on morphological grounds that polyp and medusa are independent types, each produced by modification in different directions of a more primitive type represented in development by the actinulastage.
The Reformation brought in radical changes, which were on the whole a return to the primitive type.
The epithelial cells are then able to pass from their normal position, in consequence of which they proliferate and at the same time revert to a more primitive type of cell.
