CYCLOALKYLATION OF BENZENE BY MONOMETHYL- AND DIMETHYL-SUBSTITUTED 3-CYCLOHEXENECARBOXYLIC ACIDS AND THE CORRESPONDING BICYCLIC GAMMA -AND DELTA -LACT ONES.III: REACTIONS OF 1,3- AND 1,4-DIMETHYL- AND 4-METHYL-3-CYCLOHEXENERCA RBOXYLIC ACIDS, THE GAMMA -LACTONES OF 3-HYDROCY -1,3- AND 3-HYDROXY-1,4-DI