complicated and more developed instrument of the chase than is to be found in any other form of hunting canoe, due in part, perhaps, to the great craftsmanship of the Eskimo. The construction of the kayak follows a basic plan. In all kayaks the gunwales are the main strength members, longitudinally. A few designs employ, in addition, a stiff keel member, but most have rather slender and light longitudinal batten systems having little longitudinal strength value, but which in combination with very light frames, give transverse support to the skin cover. Even in the flat-bottom models, the kayaks, unlike the umiaks, depend entirely upon the gunwales for longitudinal strength. The frames are bent and in one piece from gunwale to gunwale in all but a few flat-bottom kayaks, of the sampan cross section; these employ bent frames. The longitudinal batten systems show great variety. The eastern kayaks of the flat-bottom and V-bottom models have three longitudinal battens (including the keel or keelson) in addition to the heavy and often deep gunwale members; these are supported at bow and stern either by stem and stern post of shaped plank on edge as in the Greenland ~V~-bottom kayaks, or by light extensions of the keelson and small end-blocks as in the northern Greenland, Baffin Island, and Labrador types. The multi-chine types of the western Arctic have from seven to eleven longitudinals (including the keelson) in addition to the gunwales. In some of these kayaks there are no stem and stern posts, the battens and keelson coming together at a blunt point in small head blocks; but many types have rather intricate stem-pieces, carved from blocks of wood, and plank-on-edge stern posts. The Asiatic kayaks, curiously enough, exhibit the construction of both eastern and western Arctic kayaks, the crude, small Koryak kayak having a 3-batten ~V~-bottom, while the Chukchi kayak is built like the kayaks on the east side of the Bering Strait. The decking of kayaks is of very light construction; usually there are two heavy thwarts to support the manhole and from one to three light thwarts afore and abaft these. The Alaskan kayaks from Kotzebue Sound southward have ridged decks supported by fore-and-aft ridge-battens from the ends of the hull to the manhole. Elsewhere the deck of the kayak is flat athwartship except at the manhole, where there is some crown or ridging to increase the depth inside the boat, particularly forward of the manhole. In the majority of these kayaks short fore-and-aft battens are laid on the thwarts forward of the manhole to support the skin cover in its sweep upward to the manhole. The transverse frames do not come into contact with the skin cover, to avoid transverse ridges being formed in it; and the longitudinal battens which support the skin cover form longitudinal ridges, or chines, in it.