APPENDIX. 191 



" 5. Ancient drift, with northern bowlders, and fragments of the sandstones and limestones, 

 which occur in place a few miles further north ; depth unknown. 



" The thickness of 2, 3, and 4, is variable, though the bottom of No. 3 usually varies little 

 from the depth of eight feet from the surface. A glance at the section reveals the true period of 

 the deposit, showing conclusively that the whole is a lacustrine formation, made subsequent to 

 the deposition of the ancient drift (No. 5), which is characterized by its foreign materials, while 

 in the latter deposit not a pebble of the size of a pea can be found." 



Dr. Wyman examined this skull, and gave a scientific description of it, which was pub- 

 lished, in connection with that of Mr. Hall, in the " Journal of Natural History." The bone was 

 in perfect preservation, though not petrified, and belonged to an unknown species, which must 

 have been of great antiquity. 



