People who live under primitive conditions are often credited with a higher development of the senses than scientific investigation justifies. To some extent this is true of the eyesight and hearing of the African native. It appears that as a result of a greater :Dependence for existence upon the senses, the sense organs are used with more directness and concentration, the reverse being true of certain types of senile deafness. A greater acuity of vision, hearing and smell may be more psychological, more a result of a lesser sensory inhibition and to some extent, of habituation and concentration, than of some organic or anatomic development. It is more likely that the apparent better development of the senses amongst primitive people depends chiefly on the fullest use of the same quality of organs that other People possess. Disease patterns do differ in many respects between Negro and white patients, particularly in the uneducated, uncivilised, native in Nigeria. 'white people reflect an attitude conditioned by a greater knowledge of the subject of human sickness. The Negro on the other hand lives at peace with his various organs (1) and his attitude to various forms of sickness seems to be one of disregard. Thus the disorders in whites are commonly functional; but organic disorder takes the place of functional disorder in the Negro and is often of an advanced variety.