What's this Polypore?

[dt king]

With the recent rains and the humid weather, the dirt road behind my
business in Massachusetts has become a fungusfest.  I dropped the by
library and picked up a couple of books to see if I could figure out
what the varieties were.  I can kind of guess at most of them, but
there's a polypore I couldn't find a clue about.  I'm kind of curious. 
I put a couple of pictures and descriptions on my computer at
http://www.dexter.weblabs.com/shrooms.html.  I'd appreciate any
information you folks could give me.

Thanks,
dt king