I took these photos some time ago, and have been puzzling ever since as to which species of limpet they are. So yesterday, with a spare half hour I went to the Animal Attic in the Otago Museum - never mind the current temporary art work exhibited there, a small exhibition by Clive Humphreys - I had a look at the shells on display. There lying next to each other were two specimens of Cellana radians one much larger with a more robust outline than the other. The smaller of the two was uncannily like my limpet. The trouble is, of course that it is notoriously difficult to identify shells from photos alone, which is what I'd been trying to do using various websites. The eye gets taken in by pattern, but that is not a good characteristic upon which to identify species
