﻿150 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  doubt 
  scarcely 
  distinguishable 
  from 
  Plcmolites, 
  yet 
  the 
  concave 
  

   portion, 
  into 
  which 
  it 
  fits, 
  is 
  tranversely 
  and 
  closely 
  annulated, 
  as 
  

   it 
  were, 
  or 
  at 
  any 
  rate 
  shows 
  transverse 
  markings, 
  a 
  feature 
  which 
  

   is 
  not 
  indicated 
  nor 
  figured 
  in 
  Nicholson's 
  diagnosis 
  and 
  figure 
  

   of 
  PlanoUtes. 
  In 
  this 
  latter 
  respect, 
  no 
  doubt, 
  your 
  specimens 
  

   agree 
  better 
  with 
  Gyrichnites, 
  but 
  they 
  may, 
  also, 
  indicate 
  a 
  

   generic 
  type 
  different 
  from 
  either 
  that 
  genus 
  or 
  PlanoUtes" 
  

  

  In 
  regard 
  to 
  the 
  transverse 
  markings 
  it 
  is 
  to 
  be 
  remembered 
  

   that 
  Plcmolites 
  annularis 
  Walcott 
  from 
  the 
  Cambrian 
  of 
  Washing- 
  

   ton 
  co. 
  *N. 
  Y., 
  " 
  shows 
  numerous 
  annulations." 
  a 
  

  

  The 
  specimens 
  might 
  also 
  be 
  compared 
  with 
  Protoscolex 
  ornatum 
  

   Ulrich; 
  6 
  but 
  that 
  species 
  has 
  much 
  shorter 
  and 
  slenderer 
  tracks 
  

   with 
  much 
  narrower 
  segments. 
  

  

  Locality: 
  Silvernaile 
  quarry, 
  Worcester 
  township, 
  four 
  miles 
  

   south 
  of 
  East 
  Worcester 
  and 
  one 
  and 
  one 
  half 
  miles 
  north 
  of 
  

   Charlotteville. 
  

  

  Geological 
  horizon: 
  Near 
  top 
  of 
  Hamilton 
  formation. 
  

  

  XXVI 
  E 
  1 
  . 
  On 
  the 
  valley 
  road 
  toward 
  East 
  Worcester 
  and 
  about 
  

   one 
  half 
  mile 
  north 
  of 
  the 
  " 
  First 
  baptist 
  church 
  of 
  Summit 
  " 
  are 
  

   bluish, 
  argillaceous 
  shales 
  containing 
  plenty 
  of 
  fossils. 
  

  

  This 
  is 
  a 
  typical 
  exposure 
  of 
  the 
  soft 
  Hamilton 
  shales 
  and 
  the 
  

   following 
  fossils 
  were 
  found: 
  

  

  1 
  Spirifer 
  tullius 
  Hall 
  (rr) 
  

  

  2 
  Chonetes 
  setigera 
  Hall 
  

  

  3 
  (?) 
  Centronella 
  impressa 
  Hall 
  (c) 
  

  

  Imperfectly 
  preserved 
  and 
  difficult 
  to 
  identify. 
  

  

  i 
  

  

  4 
  Nucula 
  bellistriata 
  (Con.) 
  Hall 
  (a) 
  

  

  Small 
  form. 
  

  

  5 
  Modiomorpha 
  sp. 
  (rr) 
  

  

  6 
  Leptodesma 
  sp. 
  (rr)- 
  

  

  7 
  Liopteria 
  dekayi 
  Hall 
  (rr) 
  

  

  8 
  Murchisonia 
  micula 
  Hall 
  (?) 
  (rr) 
  

  

  9 
  Tentaculites 
  dellulus 
  Hall 
  (o) 
  

   10 
  Crinoid 
  segments 
  (c) 
  

  

  a 
  See 
  10 
  an. 
  rep't 
  U. 
  S. 
  geol. 
  surv., 
  p. 
  602, 
  and 
  pi. 
  60, 
  fig. 
  5. 
  

   b 
  Jour. 
  Cincinnati 
  soc. 
  nat. 
  hist., 
  1878. 
  1 
  : 
  90, 
  pi. 
  4, 
  fig. 
  1. 
  

  

  