Riddles: IV

I've a very long nose, but what of that?
It is not too long to lie on a mat!

I have very big jaws, but never get fat:
I don't go to church, and I'm not a church rat!

I've a mouth in my middle my food goes in at,
Just like a skate's--that's a fish that's a flat.

In summer I'm seldom able to breathe,
But when winter his blades in ice doth sheathe

I swell my one lung, I look big and I puff,
And I sometimes hiss.--There, that's enough!