Leviticus 11:42

Whatsoever goeth upon the belly. — In explanation of the general statement made in the preceding verse, three classes of creeping things are here adduced. (1) Those which move by the aid of the under part of the stomach, here described as “going upon the belly,” as serpents (see Genesis 3:14) and serpentine worms.

And whatsoever goeth upon all four. — Those (2) which have four legs and yet move like reptiles, as scorpions, beetles, &c.

Or whatsoever hath more feet. — Better, whatsoever hath many feet, that is (3), those which have a number of such short feet that they cannot easily be discerned by the naked eye, and appear to crawl about upon their stomachs, as caterpillars, centipedes, millipedes, &c.