[Illustration: FIG. 14.—Ground plan of Davis Ruin.] M’LEAN BASIN McLean Basin is 3 miles from the Old Bluff City Road near Picket corral, 32 miles from Dolores. It has been a favorite wintering place for stock and is well known to herdsmen. One can approach the ruin from the road to Bluff City and the towers here referred to are easily reached by a trail down the mesa to the highest terrace. There are said to be several ruins in the McLean Basin, the two towers (pls. 26, _c_, 27, 28, _a_, _b_) visited being placed in an exceptional position in reference to surrounding rooms. One of these towers is circular, the other D-shaped or semicircular in ground plan (fig. 16, _A_, _B_). [Illustration: FIG. 15.-Ground plan of Lion House.] Previously to the author’s study of the southwestern towers two forms of these structures were recognized; the square or rectangular, and the circular or oval. It is now known that several of the towers previously described as circular are in reality D-shaped, and this form is probably more common than the circular. [Illustration: FIG. 16.—Ground plan of ruin with towers in McLean Basin.] The rectangular building in the McLean Basin has a circular tower (pl. 28, _b_) on the southwest angle and a D-shaped tower (pl. 28, _a_) on the northeast. They resemble two turrets rising above the remaining walls that form the sides of the rectangles. These towers average about 12 feet high, and are well constructed, while low connecting walls of coarse masonry rise slightly above the surface. It would appear from the amount of débris that the remaining walls indicate a row of buildings, one story high, with circular subterranean kivas, but this can not be accurately determined without excavation of the ruin. Outside of the rectangle, however, there are at least two circular areas, possibly kiva pits. The rectangular building measures about 50 feet square. The ground on which the buildings formerly stood slopes to the south, and back of it on the north rises a low perpendicular bluff which effectually shelters it in that direction. The union of a circular and a semicircular tower with, a rectangular ruin is a feature not common in the McElmo-Yellow Jacket region but appears in Hovenweep Castle, elsewhere described. Lower down the sides of the basin and near by are many indications of walls of buildings. The pottery in the neighborhood belongs to the same black and white types commonly found in the Hovenweep and Mesa Verde areas. Except for their peculiar relation to the rectangular building the McLean towers do not differ essentially from others, which leads to the inference that they were used contemporaneously and for the same purpose. There is a well-made doorway (fig. 17) in the Round Tower. TOWER IN SAND CANYON