Nope 4Q is deffo missing - click on the Year in the 'breadcrumbs' trail above the images, and the page that opens only shows the 1/2/3Qs of 1925 ..... hmmmmn
You is here: Search > E & W, Marriage Index: 1837-1983 > 1925
choose a month in 1925:
Q1-Jan-Feb-Mar
Q2-Apr-May-Jun
Q3-Jul-Aug-Sep