\magnification=1200 \hsize=4in \overfullrule=0pt \input amssym %\def\frac2{{#1\over #2}} \def\emph#1{{\it #1}} \def\em{\it} \nopagenumbers \noindent % % {\bf Bojan Mohar} % % \medskip \noindent % % {\bf Triangulations and the Haj\'os Conjecture} % % \vskip 5mm \noindent % % % % The Haj\'os Conjecture was disproved in 1979 by Catlin. Recently, Thomassen showed that there are many ways that Haj\'os conjecture can go wrong. On the other hand, he observed that locally planar graphs and triangulations of the projective plane and the torus satisfy Haj\'os Conjecture, and he conjectured that the same holds for arbitrary triangulations of closed surfaces. In this note we disprove the conjecture and show that there are different reasons why the Haj\'os Conjecture fails also for triangulations. \bye .