Image of Trachycardium egmontianum (Shuttleworth 1856)

Description:

This was the most abundant cockle on all the outer beaches, far outnumbering yellow prickly cockles and Giant Atlantics. p.s. I think the lower right shell (more elongate) may be an Even prickly cockle (T. isocardia). I know I collected some but I don't see pics on my computer of specimens.)