Nancy {L_WROTE}:
I look forward to hearing what you find out. If you could take a few measurements (length of body, type of teeth) and maybe grab a few tissue samples, too, I would be grateful.

Nancy, they confirmed that it was frozen snake from Southern China, 3 different species, from very dark to white meat. Pretty tasty, not too tough.
Sorry, no tissue samples for you. But after cooking them in soup for a long time they might not be well-suited for any detailed analysis. I don't remember ever examining any cooked tissue samples in my biology lab work at university...
Fortunately, there were no snake teeth in the dishes, but lots of tiny bones. The snake wine was pretty nice, too!