Gavin Atkin at intheboatshed.net photographed a skiff at Mylor, Cornwall, and asks what it is. Well, I'm told it is a 15ft skiff, the smallest traditional boat raced in Cornwall. Three oarsmen row it 'randan' style, with a sculler (two oars) in the middle and a rower (one oar) at each end. If you look carefully at the picture you can see there is only one pair of thole pins (used instead of rowlocks) next to the bow and stern thwarts, but a pair on either side of the centre thwart.
Here is a picture of one in action, taken by Brave Tales on Flickr.