Rachitic with fear Gud's knees bent beneath him and he sank down in the blackness and shuddered in his soul.

Various types are met with; they are known according to their cause, as static, congenital, traumatic, paralytic, rachitic, rheumatic, arthritic, gonorrhœal, and tabetic.

Since the affected subjects suffer involvement of several of the extremities at the same time, the theory of rachitic origin seems well supported.