The Collaborative International Dictionary of English v.0.48:

Phylon \Phy"lon\, n.; pl. Phyla. [NL., fr. Gr. fy^lon race,
   tribe.] (Biol.)
   A tribe.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Phylum \Phy"lum\, n.; pl. Phyla. [NL. See Phylon.]
   1. (Zool.) One of the larger divisions of the animal kingdom;
      a branch; a grand division.
      [1913 Webster]

   2. (Biol.) A series of animals or plants genetically
      connected.
      [Webster 1913 Suppl.]