Hello - And help Identifying Some Stuff

Hi all

I'm new to the site,  Discovered the joys of fossil hunting whilst on a family holiday to Lyme Regis about 18 months ago, I've found some bits and bobs since then, mostly from Kent where I live and also from the Isle of Wight.

I have a few objects that I can't identify, indeed they might not all be fossils at all!  I would be grateful if anyone has a spare few minutes to cast their eye over them and let me know what they think... (There's two photos of each)





I found the above sticking out of a lump of chalk at the west end of Whitecliff Bay on the Isle of Wight





This was also from Whitecliff Bay, but was from the clay nest to the chalk (Reading formation according to the UK fossil Network page)









The last two where found on the beach at Compton Bay IOW

Any help greatly appreciated!

Mark

The first is a bivalve shell with a small encruster on it (another bivalve (a type of oyster in this case) living cemented to the shell). The second looks like a lump of pyrite, the third and fourth I have no idea but it's possible they're both just rocks. The third is possibly sponge worn (sponges that bore into rocks/shells for anchorage) rather than the spongey texture of bone.

I think the first two are echinoids

Craig, you mean the first one? The second pic is the first one upside down. I can kind of see echinoid in the first picture but from the bottom it looks more like a bivalve to me, piesandbeer any chance of some more pictures of it?

Thanks everyone - here's some more images of the bivalve-echinoid thing...



Another question if you don't mind - I've been down to Beltinge a few times in the last month or so and found loads of sharks teeth have attached a pic of the best ones below..



whilst sorting through I noticed a couple of them look different (below)- are they the teeth of something else or sharks teeth that have worn differently?

The teeth look to be reptilian, probably a crocodile, which are quite common at this locality.

The first one is without doubt a crushed echinoid, most likely echinocorys. Your "different teeth" look like crab claw sections (modern) to me.

http://www.ebay.co.uk/itm/S-V-F-Echinocorys-scuata-UK-Cretaceous-Echinoid-/330778594138

Link to an echinocorys on e-bay - looks about right

Unfortunately I also think you're right re the teeth Kosmos, had a look on the internet after your reply and they do look like crab claws. stevesnowball, I was hoping they might be croc teeth... oh well never mind - back to the beach...!

Yes. Crab claws! I hadn't really considered them and I suspect the 'weight' of them would have eventually given it away. Never mind and problem solved.