Help With North Texas Ids

[fossil man]

this first one i am hopeing is a piece of lobster or ship but hopefully you can help me?

This next one is just a little tooth i thought was cool, but cant quite place its id so i am sending out an S.O.S for an id for this one.

this next one i hope is a new species for my collection, so tell what i want to hear, no seriously if its anything but a Pychotus whippeli, it will be a new species for me.

the tooth is about a centimeter long.

This next one again i am hopeing for a new species, particulary a Pychotus mortoni, my luck its not but man do i wish.

this tooth at the tip is about as big as a pencile eraser.

Thanks in advance for your time and effort.

[Roz]

For me, your pics are too dark to see the details of the ptychodus teeth and (lobster?)

Someone else may be able to tell though.

[LanceH]

The spirally looking thing maybe a coprolite.