Combined nystagmus of the head and eyes, persisting during life and reappearing in consecutive generations, must be exceedingly rare, since we seldom find mention of this disorder. The family reported in this article is of Russian Jewish nationality, and at least four generations of the family have shown the affliction, members of three of which I have examined. The features of these cases are the persistence of the associated nystagmus in the stock and throughout the lives of the individual members, together with certain other nervous manifestations, notably, stammering. Both sexes had the combined nystagmus and both transmitted it to their children. FIRST GENERATION From the fact that two brothers exhibited the condition, it is possible that other instances of nystagmus preceded them. Concerning one brother, we have no additional information. The other died at 86 years, and notwithstanding his disease is said to have had good vision. His descendants