Some addition formulae for Abelian functions for elliptic and   hyperelliptic curves of cyclotomic type
  We discuss a family of multi-term addition formulae for Weierstrass functions on specialized curves of genus one and two with many automorphisms. In the genus one case we find new addition formulae for the equianharmonic and lemniscate cases, and in genus two we find some new addition formulae for a number of curves, including the Burnside curve. 
J. C. Eilbeck, S. Matsutani, and Y. Onishi