\documentclass{standalone}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[francais]{babel}
\usepackage{libertine}
\usepackage{tikz}

\usetikzlibrary{positioning, shadows, calc, shapes.multipart, chains, arrows}

\tikzset{ list/.style= {
        rectangle split, 
        rectangle split parts = 2,
        draw,
        rounded corners,
        rectangle split horizontal,
        append after command={
          let \p1 = (\tikzlastnode.east),
              \p2 = (\tikzlastnode.center),
              \n1 = {0.5 * (\x1 + \x2)} in 
          (\n1,\y2) node[inner sep = 0pt, outer sep = 0pt] (\tikzlastnode +next) {}
        }
      }}

\tikzset{ ptr/.style= {
        draw,
        *-latex,
        rounded corners,
        shorten <= -2.5pt
      }}

\begin{document}

\begin{tikzpicture}[start chain]
  \draw node[list, on chain] (c1) {15} ;
  \draw node[list, on chain] (c2) {22} ;
  \draw node[list, on chain] (c3) {3} ;
  \draw node[on chain] (null) {$\times$} ;

  \draw[ptr] (c1+next) -- (c2) ;
  \draw[ptr] (c2+next) -- (c3) ;
  \draw[ptr] (c3+next) -- (null) ;
\end{tikzpicture}

\end{document}