90 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



\'0L. 66 



were first called to the attention of archeologists by Jackson and 

 Holmes over 40 years ago, and are particularly abundant along the 

 McElmo and its tributaries. The tower is not limited to this area, 

 but is intimately associated with another widely distributed well- 



FiG. 96. — Pinnacle Ruin, AIcElmo Canyon. Colorado. 

 Photograph by T. G. Lemmon. 



defined architectural type known as the circular ruin, which is most 

 abundant in a narrow zone extending north and south, midway 

 between eastern pueblos and the Hopi. There are important varia- 

 tions in the form of towers in different areas, and it is instructive 



