Florida Peace River Fossil unknowns

[JamieLynn]

Howdy all! Here are a few things I found on the Peace River in Florida that I am not sure what they are. Any help would be appreciated! 

 

1. This may or may not be anything: But is so oddly symetrically shaped that I think it must be SOMETHING:

 

 

2. A knee cap of something?

 

 

 

3. I thought it was bone, but the striations are odd and there are rings on the end:

 

 

 

4. Is this an Alligator tooth?

 

5. I have no idea what the heck this is: 

 

 

 

 

 

 

[JamieLynn]

@PODIGGER -since you are familiar with the Peace River, any suggestions on some of these "unknonws?" Thanks!! 

[old bones]

I lightened a few to help with id.

[PODIGGER]

Just back from a weekend trip and first chance to look at the site.  The only one I would hazard a guess on is #3.  Based on the rings on the end and how solid it looks I would think it is Dugong.  I wouldn't think #4 is alligator due to the shape.  Alligator teeth are more conical and have two seam like striations along opposite sides of the tooth.

[Shellseeker]

#5 is a dugong vertebrae process.... many of these are in the Peace River.

https://www.worthpoint.com/worthopedia/quality-manatee-vertebra-florida-1841139743

[fossil of Egypt]

On 2/27/2020 at 9:13 PM, JamieLynn said:

3. I thought it was bone, but the striations are odd and there are rings on the end:

number 3 : petrified wood I think .