Tidal area, may have had some surface features partially eroded. All are of roughly this size. Thought to be cowries, but which species?
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Hi, do you have a shot of the upper side please ?
Chris Brooks - www.dragonfly-images.co.uk
My Flickr site - www.flickr.com/photos/ceb1298
Was the upper side plain white, or did it have a few spots or blemishes?
The other side is of uniform colour, with some evidence of striations similar to those visible in these photos but, as I noted, the striations may have been partly smoothed off post mortem. Ie. the surface on the other side looks pretty much like the surface on this side: there's nothing different on the other side, which is why I didn't bother with another photo.
In that case it is probably Trivia arctica, unless the erosion is very severe. T. monacha has three obvious dark spots.
Why not add the name with a suitable level of confidence?
University of Edinburgh and Biodiversity Observatory (OU)
I'd go with T.arctica too, even though the erosion looks pretty fierce.
Usually, T.monacha shows some discolouration in the 'mark' zones.
I assume you know you can ADD a photo of the top side.
Like Jonathan says, post it up and get some agreements - or someone else will soon.
See here http://www.ispot.org.uk/node/315305
THREE MARINE PROJECTS
If you want to ID it as arctica then please be my guest. I don't feel the need to join the reputation game.
Reputation is not a game. Its a way to verify names and enables iSpot users to make a valuable contribution to the scientific records of biodiversity. Some 30,000 UK records have been contributed by this route and potentially hundreds of thousands more will follow in due course.
OK. But, whatever it is, I have no interest in acquiring 'stars' through the reputation system.
This has turned a little sinister.
In ALL cases like this, it's for the original poster to decide - (MikeH). I have learned from my VERY short 'membership' that someone else does usually impose an ID - though they may not in this case.
I am coming to understand that the sooner an ID is applied, the better. It helps in the process to at least clear the backlog of unidentified objects.
I do think it might gather a few agreements if it was ID'd as Triva and that MIGHT help anyone visiting this site.
All true. Nothing sinister, I hope. (Its not that kind of mollusc) - and if you get that joke you deserve an extra star (or maybe I should lose one).
Graham, you were quite right to offer the ID. Waiting for mhosken was FRUSTRATING!
Note Mydaea's stance and see here -
Reckon you're right Graham, from the description though google images shows the underside of T.monacha looks the same.
Lat/Lng: 55.5839, -1.6443
OS grid ref: NU225323