pathologic picture in these cases seems to have va¬ ried somewhat, though the variations are not great if we consider all the recorded cases together. It seems likely that the supposed variations are merely different stages of the same process. Superficially scanned, the complete bone-marrow aplasia which has been found in some cases seems pathologically irreconcil¬ able with the complete lymphoid hyperplasia which has been found in others. A search of the literature shows,