﻿Report 
  of 
  the 
  State 
  Geologist, 
  729 
  

  

  In 
  the 
  lower 
  blue 
  shales 
  observed 
  only 
  at 
  B 
  1? 
  are 
  

  

  Chonetes 
  scitula 
  in 
  masses. 
  

  

  Tropidoleptus 
  carinatus, 
  abundant 
  and 
  normal. 
  

  

  Spirifer 
  sculptilis. 
  

  

  Cyrtina 
  Uamiltonice, 
  normal. 
  

  

  The 
  upper 
  shales 
  of 
  B 
  and 
  B 
  1} 
  have 
  afforded 
  : 
  

  

  Homalonotus 
  Dekayi. 
  

  

  Better 
  ophon 
  patulus. 
  

  

  Pleurotomaria 
  sulcomarginata, 
  common. 
  

  

  Paracyclas 
  lirala, 
  abundant. 
  

  

  Grammy 
  sia 
  hisulcata, 
  large 
  and 
  typical. 
  

  

  G. 
  magna. 
  

  

  Leda 
  diversa. 
  

  

  Aetinopteria 
  zeta. 
  This 
  species 
  of 
  the 
  type 
  of 
  A. 
  Boydi 
  

   abounds 
  and 
  agrees 
  with 
  the 
  original 
  specimen 
  from 
  Ithaca. 
  

  

  Aetinopteria 
  Boydi, 
  rare. 
  

  

  PalcBoneilo 
  emarginata. 
  

  

  Nuculla 
  corbuliformis. 
  

  

  Modiomorpha 
  mytiloides. 
  

  

  Tropidoleptus 
  carinatus, 
  common. 
  

  

  Chonetes 
  scitula^ 
  common. 
  

  

  Atrypa 
  reticularis, 
  a 
  small, 
  finely 
  striated 
  form 
  characteristic 
  of 
  

   the 
  Hamilton. 
  

  

  Spirifer 
  mucronatus, 
  small 
  form 
  with 
  rounded 
  cardinal 
  extrem- 
  

   ities. 
  

  

  Spirifer 
  mesastrialis, 
  rare 
  at 
  B. 
  

  

  Some 
  differences 
  are 
  noticeable 
  in 
  the 
  faunas 
  of 
  B 
  and 
  B 
  b 
  and 
  

   A 
  ; 
  and 
  by 
  reason 
  of 
  the 
  time 
  and 
  care 
  given 
  to 
  the 
  exploitation 
  

   of 
  the 
  former, 
  I 
  consider 
  the 
  fauna, 
  as 
  here 
  given, 
  a 
  fuller 
  repre- 
  

   sentation 
  of 
  the 
  actual 
  fossil 
  contents 
  of 
  the 
  strata, 
  than 
  in 
  the 
  

   case 
  of 
  station 
  A. 
  If, 
  however, 
  there 
  exists 
  a 
  palpable 
  difference 
  

   between 
  the 
  faunas 
  at 
  B 
  and 
  B 
  x 
  , 
  and 
  that 
  of 
  the 
  typical 
  upper 
  

   Hamilton 
  shales 
  in 
  regions 
  where 
  the 
  Tully 
  limestone 
  is 
  present, 
  

   they 
  may 
  be 
  reduced 
  to 
  the 
  existence 
  in 
  the 
  former 
  of 
  Aetinop- 
  

   teria 
  zeta, 
  and 
  the 
  not 
  infrequent 
  occurrence 
  of 
  Spirifer 
  mesa- 
  

   strialis. 
  

  

  Between 
  stations 
  A 
  and 
  B 
  there 
  are 
  slight 
  exposures 
  along 
  the 
  

   bed 
  of 
  the 
  creek, 
  and 
  at 
  several 
  points 
  on 
  the 
  side 
  hill. 
  These 
  

   92 
  

  

  