Strange fossils found in New York

[TJM4284]

I found this fossil in a riverbed in upstate New York. At first I thought it may be a turtle stone or some other form of concretion however when i picked it up it had features that made me think it may be a skull of some kind. It looks as if it has a neck, jaw bones and a mouth. It is really remarkable to look at. It seems to be made of chert and is roughly the size of a cantaloupe and was found along side Crinoid fossils . If anyone has any incite on what this may be it would be greatly appreciated. 

[hadrosauridae]

I cant tell you what it is, but I can tell you what it isn't.  It isnt a head or skull.  Yes, its a suggestively shaped rock, but not a fossil as you see it. If its a concretion, it COULD have a fossil inside.  

[Fossildude19]

I'm going to say this is geologic in nature, and likely a chert nodule of some sort.

Could potentially have a fossil inside. I broke open a chert nodule from the Herkimer area, and found a tiny trilobite inside it.