﻿(4) 
  

  

  EXPLANATION 
  OF 
  PLATES. 
  

  

  the 
  letter 
  h. 
  The 
  height 
  of 
  the 
  bank 
  on 
  the 
  north 
  side, 
  indicated 
  by 
  the 
  letter 
  g, 
  is 
  

   somewhat 
  less 
  than 
  that 
  of 
  the 
  south 
  side. 
  

  

  The 
  accompanying 
  wood 
  cuts 
  represent 
  the 
  transverse 
  and 
  longitudinal 
  sections 
  

   of 
  the 
  large 
  pot-hole 
  No. 
  1, 
  showing 
  the 
  position 
  of 
  large 
  mass 
  of 
  slate 
  represented 
  

   as 
  the 
  Table 
  rock 
  in 
  the 
  diagram. 
  

  

  F 
  Fig. 
  1. 
  Fi 
  

  

  o 
  e: 
  

  

  The 
  line 
  c 
  d 
  is 
  in 
  the 
  direction 
  

   from 
  F 
  to 
  Fi 
  of 
  the 
  diagram, 
  a 
  

   represents 
  the 
  line 
  of 
  the 
  floor 
  of 
  

   the 
  pot-hole, 
  upon 
  which 
  the 
  prin- 
  

   cipal 
  parts 
  of 
  the 
  mastodon 
  were 
  

   found, 
  curving 
  downwards 
  to 
  the 
  

   deeper 
  part 
  in 
  the 
  direction 
  of 
  F. 
  

   b 
  represents 
  the 
  line 
  of 
  slipping 
  of 
  

   the 
  mass 
  and 
  the 
  projection 
  of 
  the 
  

   rock 
  below. 
  

  

  Fig. 
  2. 
  

  

  A 
  longitudinal 
  section 
  of 
  the 
  pot-hole 
  from 
  L 
  to 
  H, 
  showing 
  the 
  position 
  of 
  the 
  

   Table 
  rock, 
  a 
  represents 
  the 
  deeper 
  part 
  of 
  the 
  pot-hole, 
  towards 
  F. 
  

  

  PLATE 
  V. 
  

  

  A 
  view 
  of 
  the 
  south 
  end 
  of 
  the 
  large 
  pot-hole, 
  from 
  which 
  the 
  principal 
  part 
  of 
  

   the 
  mastodon 
  bones 
  were 
  taken. 
  The 
  outline 
  is 
  irregular, 
  showing 
  two 
  recesses, 
  

   which 
  are 
  the 
  margins 
  of 
  two 
  smaller 
  pot-holes, 
  which 
  with 
  other 
  similar 
  ones 
  

   had 
  been 
  so 
  worn 
  as 
  to 
  communicate, 
  forming 
  one 
  large 
  cavity. 
  

  

  The 
  lower 
  jaw 
  of 
  the 
  mastodon 
  was 
  found 
  at 
  a 
  point 
  (a) 
  on 
  the 
  margin 
  of 
  the 
  

   left 
  hand 
  niche, 
  and 
  near 
  the 
  level 
  of 
  the 
  water, 
  as 
  shown 
  in 
  the 
  plate. 
  (See 
  a, 
  

   diagram, 
  plate 
  4.) 
  The 
  greater 
  part 
  of 
  the 
  bones 
  were 
  found 
  at 
  a 
  depth 
  about 
  

   twenty-five 
  feet 
  lower 
  than 
  the 
  water 
  line, 
  as 
  shown 
  in 
  the 
  figure. 
  

  

  