Help needed for identifying Aurora fossils

[FFRay]

 I went out this past weekend to Aurora to find more fossils and found a few things I am unsure as to what they are. 

 

Fossil #1: 29 millimeters in length 

 

Fossil #2: 20 millimeters in length. I thought potentially a bird bone but I also saw some catfish spines on Elasmo.com in the Lee Creek section that looked similar to this fossil. 

 

Fossil #3: 20 millimeters in length. I thought maybe cetacean or pinniped but I have no clue. The tooth has an odd hook shape that I have never seen on any other cetacean teeth I have found.

 

Fossil #4: 20 millimeters in length. I originally thought it could be a turtle shell but after looking at the patterns I am assuming it is a sand dollar but I am not sure. 

[Shellseeker]

44 minutes ago, FFRay said:

Fossil #1: 29 millimeters in length 

 

Fossil #2: 20 millimeters in length. I thought potentially a bird bone but I also saw some catfish spines on Elasmo.com in the Lee Creek section that looked similar to this fossil. 

 

Fossil #3: 20 millimeters in length. I thought maybe cetacean or pinniped but I have no clue. The tooth has an odd hook shape that I have never seen on any other cetacean teeth I have found.

 

Fossil #4: 20 millimeters in length. I originally thought it could be a turtle shell but after looking at the patterns I am assuming it is a sand dollar but I am not sure. 

 

I am not an Aurora expert,  but I do find similar fossils in Florida. 

 

I think 1 & 2 are fish mandibles. #3 is a Dolphin tooth,  should be Identifiable to species. #4 is definitely a sand dollar but not enough to id to species.

[Shellseeker]

Dolphin may be Delphinodon dividum or some cousin..

[FFRay]

Thank you!

[Coco]

It is better to put the text under each photo concerned because we are forced to scroll vertically to know what you’re talking about. And a photo numbering also helps with the answers.

 

Coco