﻿Ambocoelia 
  spinosa, 
  sp. 
  nov. 
  

  

  Figs. 
  6, 
  7. 
  — 
  The 
  exterior 
  and 
  interior 
  of 
  a 
  brachial 
  valve. 
  X 
  2 
  . 
  

   Fig. 
  8. 
  — 
  A 
  portion 
  of 
  the 
  exterior 
  enlarged, 
  showing 
  the 
  elongate 
  

   impressions 
  on 
  the 
  surface, 
  which 
  appear 
  to 
  be 
  bases 
  of 
  spines. 
  

   Hamilton 
  shales, 
  between 
  225 
  to 
  350 
  feet 
  in 
  the 
  Livonia 
  shaft. 
  

  

  Nuculites 
  subcuneatus, 
  sp. 
  nov. 
  

  

  Figs. 
  9, 
  10. 
  — 
  Right 
  and 
  left 
  valves; 
  natural 
  size. 
  

   Hamilton 
  shales; 
  at 
  456 
  feet 
  in 
  the 
  Livonia 
  shaft. 
  

  

  Lunulicardium 
  Livoniae, 
  sp. 
  nov. 
  

  

  Fig. 
  11. 
  — 
  Left 
  valve, 
  showing 
  the 
  form 
  and 
  character 
  of 
  surface. 
  

   Lark 
  shales 
  of 
  the 
  Hamilton 
  group, 
  at 
  51 
  feet 
  in 
  the 
  Livonia 
  shaft. 
  

  

  Lucina 
  (?) 
  Livonensis, 
  sp. 
  nov. 
  

  

  Fig. 
  12. 
  — 
  The 
  exterior 
  of 
  a 
  left 
  valve 
  in 
  which 
  the 
  radiating 
  lines 
  

   are 
  represented 
  rather 
  too 
  sharp 
  and 
  the 
  posterior 
  cardinal 
  slope 
  too 
  

   long 
  and 
  straight. 
  

  

  Marcellus 
  shales, 
  at 
  820 
  feet 
  in 
  the 
  Livonia 
  shaft. 
  

  

  Onychochilus 
  nitidulus, 
  sp. 
  nov. 
  

  

  Figs. 
  13, 
  14, 
  15. 
  — 
  Three 
  views 
  of 
  a 
  specimen, 
  showing 
  the 
  form 
  of 
  

   the 
  shell 
  and 
  the 
  sinistral 
  whorls. 
  X 
  10 
  . 
  

  

  Fig. 
  16. 
  — 
  View 
  of 
  a 
  specimen 
  with 
  a 
  somewhat 
  angular 
  body- 
  whorl, 
  

   but 
  represented 
  as 
  quite 
  too 
  sharply 
  carinate. 
  X 
  10. 
  

  

  Stafford 
  limestone 
  (Marcellus 
  group), 
  Stafford, 
  N~. 
  Y. 
  

  

  Hyolithus 
  ceratophilus, 
  sp. 
  nov. 
  

   Figs. 
  17, 
  18. 
  — 
  Ventral 
  and 
  dorsal 
  sides 
  of 
  the 
  type-specimen. 
  

   Corniferous 
  limestone, 
  near 
  Geneva, 
  N. 
  Y. 
  

  

  382 
  

  

  