Possible vertebrae & Crab Leg?

[freerangetraveler]

Hello all

 

Still a bit of a newbie here but I stumbled across a couple things I haven’t seen before…  The first find looks a bit like a vertebrae (pics 1 and 2)…  

 

Pics 3 and 4 are what looks like a segmented crab leg, but I’m just not sure what to make of it.

 

It may just be my mind playing tricks (in both cases), but I was hoping to get the consensus of the experts here.  

 

Any help is much appreciated!

 

Thanks,

 

Paul L.

Edited March 27, 2022 by freerangetraveler

[caterpillar]

First: Rock

Second: Echinoid