This book helped me a lot

?

Not sure what this is but it's cool

27cm(not sure if it's the full fossil)

Dinorthis

Middle Ordovician 

4.5cm

Widespread North America 

Limestone 

Helpful fossil website

This website helped me a lot

http://www.crinus.info/

Fusispira nobilis

Ordovician gastropod

Ontario Canada 

6cm

Limestone

Conularia

Upper Cambrian through Permian 

Widespread North America 

3cm (only very end of full fossil)

Limestone

Actinoceras

Upper Ordovician cephalopod 

7cm long

Found in eastern North America 

Limestone