Addendum to "Ricci-flat holonomy: a Classification": the case of   Spin(10)
  This note fills a hole in the author's previous paper ``Ricci-Flat Holonomy: a Classification'', by dealing with irreducible holonomy algebras that are subalgebras or real forms of $\mbb{C} \oplus \mf{spin}(10,\mbb{C})$. These all turn out to be of Ricci-type. 
Stuart Armstrong