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POPULAR MISCELLANY. 



Prehistoric Hnmaii Remains in Mexico. 

 — Mariano de la Barcena describes in the 

 " America^ Naturalist " some liuman re- 

 mains that have been found in the hill 

 Penon de los Baiios, near the city of Mexi- 

 co, imbedded in a hard rock of silicified 

 calcareous tufa. The cranium, with the up- 

 per and lower maxillsB and fragments of 

 the collar-bone, vertebrae, ribs, and bones 

 from the upper and lower limbs, are ex- 

 posed, and present a yellowish appearance 

 and the characteristic aspects of fossiliza- 

 tion. No other fossils occur in the hill, 

 and the age of the formation can only be 

 estimated. The bed has evidently suffered 

 upheaval since the bones were deposited in 

 it, and their disordered condition is ac- 

 counted for by this fact. Two facts seem 

 at once to show that, even supposing it to 

 be of the present age, it must be of remote 

 antiquity. They are, the elevation of the 

 ground above the actual level of Lake Tez- 

 cuco, and the remarkable hardness of the 

 rock, which is different from that of the 

 other calcareous rocks that contain remains 

 of ceramics or roots of plants clearly mod- 

 ern. The stratigraphical and lithologlcal 

 characteristics of the ground indicate that 

 the formation belongs to the Upper Quater- 

 nary, or at least to the base of the present 

 geological age. 



