These types of vessels came from the West of Germany (Westphalia) and entered the Netherlands by way of the Lower Rhine and the Waal, and through the North-West of North Brabant. They are not met with on the Meuse, or on the Lower Waal below Tiel. Aaken have been built on a small scale along the Merwede, and at other points of Holland, where this same type was again found in the old clinker-built “Turfeiker” which seems now to have disappeared entirely. The hulls of all these craft were made in the beginning by overlapping planks, hence it was the old mode of construction used on the Baltic Sea. These vessels were all long, narrow and flat-bottomed, like the “Bovenlanders”. ~B~) _Boats of the Meuse._ The Meuse boats, also long and narrow, form a special class of which the type differs completely from that of the Rhenish craft just mentioned. The _Whalemajol_, the _Whalepont_ and the _Maaspont_, as well as the smaller Spitsbek and the Herna, may be mentioned as fundamental types. All these types are found on the Belgian Meuse and in our country as far down as Roermond. Small vessels called _Bovenmaasche Aaken_ or _Hedelsche Aaken_, frequently used as dredging flats, are frequently found on the Lower Meuse in the Netherlands. The shape of these craft is different from that of the Meuse boats just mentioned from which, however, they are descended, but their rudder corresponds rather with that of the Rhenish craft which circulate above Bonn. ~C~) _Boats of the Upper Rhine_ (above Bonn and inclusive of the regions West of the Rhine and East of the Meuse). The fundamental type is here the _Keen_, and with it are found the _Keenaak_ and a boat of more recent date, the _Slof_. One of these types of boats was introduced at ’s Gravenmoer, in the XIXth century, because it appeared suitable for exploiting the osier beds at Biesbosch, but since then many changes have been made in the stern and the rudder. None of these types has its origin in the Netherlands. The “Hagenaar”, like the “Turfeiker”, corresponds to the “Dorstensche Aak”. There is also found on the Upper Rhine, as well as on the Meuse, a boat called the _Bunder_ which dates only from the XIXth century. Aside from the “Bunder”, the hulls of the types of craft which have just been mentioned are clinker built. The vessels mentioned under letter B above must also have been clinker built formerly, judging by what old boatmen say and by what is seen on an old engraving of a Whalemajol, belonging to the collection of Mr. Van Gijn, as well as by what is shown on a stone, which dates from the end of the XVIIIth century, placed in the front of a house in Sint-Pieterstraat at Maastricht and representing a Herna. It is impossible to say whether carvel-built or clinker-built hulls existed at the same time, or whether the former are of more recent date. It may be assumed, however, that clinker-built hulls are older than the others.