His mode of locomotion was by a large wooden bowl, in which he sat and moved forward by advancing first one side of the bowl and then the other, by means of his hands.

The nodules or "adventitious joints" were the result of imperfect ossification, or, in other words, of motion before ossification was completed.
Analogous to rachitis is achondroplasia, or the so called fetal rickets--a disease in which deformity results from an arrest, absence, or perversion of the normal process of enchondral ossification.

It is decidedly an intrauterine affection, and the great majority of fetuses die in utero.

Thomson reports three living cases of achondroplasia.

The first was a child five months of age, of pale complexion, bright and intelligent, its head measuring 23 inches in length.