Help with ID?

[Kabakap]

Hello! I was here a few years ago asking for ID, and I'm back again.

I scour the Humber river in Toronto for water insects and rocks, usually, and I found what I think are some fossils!
If anyone can help me identify them, I'd be very grateful.

I have some pictures below. The 'fossil', if it is a fossil, is just slightly under a centimeter across.
(As a bit of an aside, I'm an avid fan of rocks but I can't usually figure out what they are, other than nice to look at. Is this an appropriate place for potentially IDing those, as well? Or should I find a rock forum in particular?)


1. This is the only one I think I know! I'm assuming those are crinoid bits in there. The rock itself is a little over two inches across. This is the front,

 

And this is the back.

 

2. All I know is this seems shellish. Front and back, below. About an inch, maybe a little more.

 

 

 

3. This one seems similar to the one above, but I've got an eye for bugs, not for fossils. An inch across, if not a little more.

 

4. No idea where to start with this. The upper left corner is what caught my eye. The macro shot is a bit blurry. My apologies! The 'fossil', if it is one, is about a centimeter wide, slightly less.

[Kane]

1. Yes: Crinoid stem and ossicles.

2. Brachiopods (genus and species name escape me at the moment).

3. Possibly coral.

4. Trilobite glabella belonging to Flexicalymene sp.

[Malcolmt]

Kane is correct as usual

 

[Kabakap]

18 hours ago, Kane said:

1. Yes: Crinoid stem and ossicles.

2. Brachiopods (genus and species name escape me at the moment).

3. Possibly coral.

4. Trilobite glabella belonging to Flexicalymene sp.

 

17 hours ago, Malcolmt said:

Kane is correct as usual

 

Thank you both! The trilobite glabella is exciting! I hope to find more trilobite pieces at some point

[Denis Arcand]

On 11/8/2021 at 8:59 PM, Kane said:

2. Brachiopods (genus and species name escape me at the moment).

 

I am thinking either Rafinesquina or Strophomena, I'm just a beginner.

 

I'm curious, maybe @Tidgy's Dad will know?

[Tidgy's Dad]

There are several possible suspects.

Not enough of them left to be certain.