[12] The situation of the cemetery, one of the characters of Prudden’s “unit type,” appears constant in one kiva buildings, but is variable in the pure type, and, as shown in the author’s application of the unit type to the crowded condition in Spruce-tree House and other cliff-houses, does not occur in the same position as in pueblos of the pure type open to the sky. While villages similar to the Mummy Lake group, in the valleys near Mesa Verde, have individual variations, the essential features are the same, as will appear in the following descriptions of Surouaro, and ruins at Goodman Point, Mud Spring, Aztec Spring, and Mitchell Spring. Commonly, in these villages, one mound predominates in size over the others, and while rectangular in form, has generally circular depressions on the surface, recalling conditions at Far View mound before excavation. These mounds indicate large buildings in blocks, made up of many unit forms of the pure type, united into compact structures. One large dominant member of the village recalls those ruins where the village is consolidated into one community pueblo. The separation of mounds in the village and their concentration in the community house may be of chronological importance, although the relative age of the simple and composite forms can not at present be determined; but it is important to recognize that the units of construction in villages and community buildings are identical. SUROUARO The cluster of mounds formerly called Surouaro, now known as Yellow Jacket Spring Ruin, is situated near the head of the canyon of the same name to the left of the Monticello road, 14 miles west of Dolores. This village (pls. 1, _c_; 2, _c_) contains both large and small houses of the pure pueblo type, covering an area somewhat less than the Mummy Lake group, on the Mesa Verde. The arrangement of mounds in clusters naturally recalls the Galisteo and Jemez districts, New Mexico, where, however, the arrangement of the mounds and the structure of each is different. The individual houses in a Mesa Verde or Yellow Jacket village were not so grouped as to inclose a rectangular court, but were irregularly distributed with intervals of considerable size between them.[13] The largest mound in the Surouaro village, shown in plate 1, _c_, corresponds with the so-called “Upper House” of Aztec Spring Ruin, but is much larger than Far View or any other single mound in the Mummy Lake village.