MEMOIRS UNIV. CALIF.. VOL. 1, NO. 2 



IMERRIAM1 PLATE 21 



Fig. 1. The locality at which the principal excavation work of the University of California has been car- 

 ried on. The exposure to the left shows separation of distinct strata. The small white patches in the 

 asphalt represent weathered bones still in the original matrix. Photograph by Ralph Arnold. 



Fig. 2. A tar seep. The area in the middle of the seep is very soft. Toward the margins the 

 gradually hardens. 



