Axelsonia littoralis is a scarce littoral species that appears to be confined to sites below high water mark in Eire and S.E. England. The body is greyish blue in colour, the PAO is ABSENT and the eyes each have eight ocelli. The biggest specimen in the NHM (from Canvey Island) is 2.0 mm in length. The outer edge of the claw bears two long spines. The mucro is highly distinctive with three large apical teeth and two small basal teeth that are sometimes difficult to see (Fig. 1).