No. 386.] REMAINS FROM THE TRENTON GRAVELS. I51 
of 10 millimeters (Fig. 1), and the surface of the brain-case is 
almost without a scratch. The lower portion of the face has 
been broken away in a manner similar to that seen in many 
skulls from recent graves, and not directly through the stronger 
parts of the bone, as in the case of the Calaveras skull. The 
worn appearance of the margins of the orbits and the portions 
that remain of the zygomatic arches may be ascribed to the 
Fic. 8. 
vicissitudes of a brief journey in the waters of the Delaware 
River or Assunpink Creek. Though the surface of the ground 
where the skull was found is twenty feet above the ordinary 
level of the Delaware, the locality has been overflowed in recent 
years, so that existing agencies could have swept skull and 
gravels into place and buried them beneath succeeding strata 
of sand and gravels and huge ice-rafted boulders. The length 
of time that has elapsed since the skull was deposited in the 
gravels is probably very great, though of course it is not 
geologically ancient. The presence of the fragments of crania 
