RESEARCH IN CHINA. PLATE XLI. 

A. Triangulation point 24% miles northwest of Lung-t’an-ssi, atlas sheet a 2, altitude 5,500 feet. Looking south across canyon to main divide 
of the Ts’in-ling-shan, showing general uniformity of summit altitudes presumably inherited from a formerly existing peneplain, and 
profiles of old valleys, especially apparent in the foreground above recent canyon; in general a characteristic view of the dissected surface 
of Ts’in-ling stage in hard slates, 
B. Ridge 4 miles southeast of Lau-hién, Shen-si, atlas sheet ¢ 4, altitude about 2,So0 feet. View northeastward across the heights which are 
taken to represent the Ts’in-ling surface, which is traversed by deep canyons on soft schists and is poorly preserved. 
