﻿PLATE 
  H. 
  

  

  Orthoceras 
  Staffordensis, 
  sp. 
  nov. 
  

   Fig. 
  1. 
  — 
  ISTatural 
  size 
  view 
  of 
  the 
  original 
  specimen. 
  

   Fig. 
  2. 
  — 
  An 
  enlargement 
  of 
  the 
  surface 
  ornamentation. 
  X 
  5, 
  

   Stafford 
  limestone 
  of 
  the 
  Marcellus 
  shales. 
  Stafford, 
  AT. 
  Y. 
  

  

  Orthoceras 
  incarceratum, 
  sp. 
  nov. 
  

  

  Fig. 
  3. 
  — 
  The 
  original 
  specimen, 
  showing 
  the 
  approximate 
  amplia- 
  

   tions 
  and 
  the 
  fine 
  concentric 
  and 
  longitudinal 
  ornamentation. 
  

  

  Fig. 
  4. 
  — 
  An 
  enlargement 
  of 
  the 
  surface, 
  showing 
  the 
  external 
  mark- 
  

   ings 
  in 
  more 
  detail. 
  X5. 
  

  

  Lower 
  limestone 
  of 
  the 
  Marcellus 
  shales 
  at 
  854 
  feet 
  in 
  the 
  Livonia 
  

   shaft. 
  

  

  Orthoceras 
  Geneva, 
  sp. 
  nov. 
  

  

  Fig. 
  5. 
  — 
  An 
  enlargement 
  of 
  the 
  exterior, 
  showing 
  the 
  equidistant 
  

   and 
  subequal 
  longitudinal 
  striae 
  and 
  the 
  finer, 
  much 
  more 
  closely 
  set 
  

   concentric 
  lines. 
  X 
  5. 
  

  

  Figs. 
  6, 
  7. 
  — 
  Opposite 
  sides 
  of 
  the 
  original 
  specimen. 
  

  

  Corniferous 
  limesto-ne. 
  Geneva, 
  JV. 
  Y. 
  

  

  Orthoceras 
  nuntioides, 
  sp. 
  nov. 
  

   Fig. 
  8. 
  — 
  A 
  view 
  of 
  the 
  typical 
  specimen, 
  in 
  which 
  the 
  vertical 
  surface 
  

   lines 
  have 
  not 
  been 
  made 
  sufficiently 
  fine. 
  

  

  Fig. 
  9. 
  — 
  An 
  enlargement 
  of 
  the 
  exterior. 
  X 
  5. 
  « 
  

   Marcellus 
  shales. 
  Chapinville, 
  JV. 
  Y. 
  

  

  Orthoceras 
  fenestrulatum, 
  sp. 
  nov. 
  

   Fig. 
  10. 
  — 
  An 
  internal 
  cast 
  with 
  a 
  small 
  portion 
  of 
  the 
  shell 
  attached, 
  

   showing 
  the 
  non-annulated 
  form 
  and 
  the 
  surface 
  characters 
  within 
  and 
  

  

  without. 
  

  

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