Fossil ID help. These are the very last ones in my collections I'm having difficulty identifying. Probably the hardest

[Gwen.Sauer]

First one was theorized to be a gerastos trilobite, but I am unsure after comparing images

 

The second image came with a note that said pachycephalosaurus vertebrae, hell creek. I don't know how accurate that is but if someone could at least tell me what type of vertebrae this is because all the ones I looked up were not this intricate

 

Third and fourth one I have no idea what they are they never had any notes attached when I unpacked. I completely understand if nobody can identify exactly what they are but if someone can tell me what bones they at least are I'm happy with that

 

The last two pictures are the front and back of what I assume is a juvenile mammoth wrist bone. Or at least that's what the note said there was no location written down

 

Goodness, I believe this might be the last post of all the stuff I found. I really do appreciate everyone's help. 

 

 

 

 

 

 

[Gwen.Sauer]

It appears the images uploaded in a different order then the way the post was set up. If anyone has any questions let me know

[jikohr]

That's a really awesome collection!

The Trilobite appears to be a Gerastos from the Devonian of Morocco.

For the others, especially the dinosaur bones, I recommend posting multiple pictures of the specimen from different angles as well as any information you have on it especially where it was found.

[Gwen.Sauer]

When I get off work later I'll post more pictures of different angles but unfortunately due to a lot of the paperwork being lost I'm unsure where some of these were found. 

[Troodon]

On the dinosaur material no obtuse angles.  Straight in photos of all sides.   Without a locality and formation might be difficult to ID.

[Gwen.Sauer]

Wrist bone 

[Gwen.Sauer]

Mystery, you don't have to narrow it down to what it's from but if you could tell me what it even is I'd appreciate it. 

[Gwen.Sauer]

The second great mystery. This one I know came from an online shop and came with a certificate. I will continue to dig around for whatever might have happened to those. In the meantime, you don't have to tell me what it's from, I totally understand that it's impossible without more information, trust me I wish I had it, but what ever it might be? 

[Troodon]

Not getting a dinosaurian vibe on these bones more mammal.  Really important to find the locality on these items.  Hopefully some mammal experts will chime in.

[jpc]

Mammoth or mastodon wrist/ankle seems right.  There others here who know better than me.