Can you identify these seashells?

[Wheres Toto]

Hello,

I need help.  I'm trying to identify a bunch of seashells and I can't find the ones shown below.   No matter what I search on, I'm not even getting anything close.  They are a creamy white on the other side.

Thank you!

 

[almondbutterandjelly]

Some kind of slipper shell?

[Wheres Toto]

28 minutes ago, perky said:

Some kind of slipper shell?

Thank you for responding but doesn't look like it.   

I took a better picture showing both sides.  Google is really letting me down. 

 

[Andromeda]

Could it be a variant of a common razor clam (Atlantic jacknife clam)? they are more of a rectangular shape. Try looking at pictures of those, there are many different color and shape variants.

 

[Wheres Toto]

1 hour ago, RosemaryAndThyme said:

Could it be a variant of a common razor clam (Atlantic jacknife clam)? they are more of a rectangular shape. Try looking at pictures of those, there are many different color and shape variants.

 

Thank you.  I did look at razor clams.  These seem to be thicker but I'll look more and see if that's a possibility.