Its one of Dave Z's earlier designs, a predecessor of Wayward.
The top panel is described as "crab claw", and Dave refers to the "boards" as "off centre boards" since they are deployed to be used on both sides rather than just on the leeward side as with "lee boards". Lots of interesting things going on there.
If you go to http://triloboats.blogspot.com/ you will find Dave's very extensive and interesting website.