\begin{table}%t3
%\centering
\par
\caption{Radial velocities of member galaxies in groups ShCG~181, ShCG~344,
ShCG~361, and ShCG~362.}
\label{t3}
\begin{tabular}{rccccccc}
\hline\hline
\multicolumn{2}{c}{ShCG~181} & \multicolumn{2}{c}{ShCG~344} &
\multicolumn{2}{c}{ShCG~361} & \multicolumn{2}{c}{ShCG~362} \\
\hline
 gal & $v_{\rm rad}$ & gal & $v_{\rm rad}$ & gal & $v_{\rm rad}$ & gal & $v_{\rm rad}$ \\
  & [km~s$^{-1}$] & & [km~s$^{-1}$] & & [km~s$^{-1}$] & & [km~s$^{-1}$] \\
\hline
 1  & 28~130 & 1  &  23~180   &  1 & 24~600    & 1 & 26~430 \\
 2  & 27~410 & 3  &  23~260   &  2 & 23~160    & 2 & 26~630 \\
 3  & 28~130 & 4  &  23~300   &  3 & 24~000    & 3 & 26~540 \\
 4  & 28~280 & 5  &   8310   &  4 & 22~710    & 4 & 26~060 \\
 7  & 28~520 & 6  &  23~160   &  5 & 24~750    & 5 & 26~030 \\
 9  & 27~050 &    &          &  6 & 23~250    & 10 & star \\
12  & 27~770 &    &          &  7 & 17~040    &   &       \\
15  & 28~070 &    &          &  8 & 23~940    &   &       \\
    &       &    &          &  9 & 24~480    &   &       \\
    &       &    &          & 10 & 24~150    &   &       \\
\hline
\end{tabular}
\end{table}