I really couldn't find good instructions for this pattern online so I figured I'd post my variation. I have a couple buddies heading to Belize in May and being stuck in school I volunteered to tie them some flies so at least part of me can go. Here is how I tie this pattern. It was originated by Craig Matthews owner of Blue Ribbon Flies which is one of the best fly shops I have ever been to, if you are in West Yellowstone you gotta stop in.
Turneffe Crab - Permit/Bonefish Fly
Hook: TMC 811S #2-4
Thread: Tan 6/0 Uni
Eyes: Medium Brass Dumbell Eyes
Body: Cream Furry Foam
Legs: MFC Tan Barred Rubber Legs.
Wing: Elk Hair
Cement: Hard as Hull
|Step 1: Tie in dumbell eyes|
|Step 2: Cut furry foam to a taper.|
|Step 3: Tie in furry foam on the underside of the hook|
|Step 4: Invert hook and tie in 4 rubber legs at the point of the dumbell eye|
|Step 5: Fold furry foam over and tie down|
|Step 6: Tie in elk hair wing|
|Step 7: Whip finish and trim head|
|Step 8: Coat all thread on underside of fly with hard as hull|
This is the permit's eye view of the fly. It is a pretty simple fly the only tricky part is tying the furry foam in centered on the underside of the fly. Also I'd recommend omitting step #8 if your buddies are going to Belize without you so all the flies fall apart, that way you don't have to hear about all the fish they caught.