210 
Dr Gardiner, On the mode of formation, etc. 
principle; and it is not difficult to suggest a working hypothesis to 
account for “ graft union.” 
Connecting threads may be subsequently obliterated, overlaid 
or possibly re-formed. 
Certain observations and deductions appear to indicate that 
cells are not in reality necessarily brought into direct protoplasmic 
continuity by connecting threads, but that the union is in many, if 
not in most instances, indirect or discontinuous. 
It was suggested that the mid or separation bodies of certain 
animal cells described by Fleming and Hoffmann are rather of the 
nature of connection bodies comparable not to the cell-plate but to 
the connecting threads. 
