What does the literary master mean by "the bone of Lantai"?

The bones of Lantai are the result of fortune-telling by measuring the size of hand bones: the bones of one size are one foot one inch, the bones of disciples are one foot one inch two points, the bones of Lantai are one foot one inch three points, the bones of hurricane are one foot one inch four points, and the bones of bare hands are one foot one inch six points. ...