﻿NIAGARA 
  FALLS 
  AND 
  VICINITY 
  

  

  22^ 
  

  

  Genus 
  ceratiocaris 
  McCoy 
  

  

  [Ety. 
  : 
  y.tpdxiov, 
  pod; 
  xapi^, 
  shrimp] 
  

  

  (1849. 
  ^'^in. 
  mag. 
  nat. 
  hist. 
  ser. 
  2, 
  4:412) 
  

  

  Carapace 
  consisting 
  of 
  a 
  smooth, 
  pod-shaped 
  bivalved 
  

   out 
  eye 
  nodes. 
  Valves 
  of 
  

   carapace 
  elongate, 
  subovate, 
  

   or 
  subquadrate, 
  truncated 
  be- 
  

   hind. 
  A 
  free 
  lanceolate 
  ros- 
  

   trum 
  occurs. 
  Body 
  of 
  14 
  or 
  

   more 
  segments, 
  of 
  which 
  from 
  

   four 
  to 
  seven 
  extend 
  beyond 
  

   the 
  carapace. 
  Some 
  of 
  these 
  

   have 
  obscure 
  branchial 
  ap- 
  

   pendages. 
  Telson 
  a 
  long, 
  

   pointed 
  spine, 
  with 
  two 
  smaller 
  

   lateral 
  spines 
  (cercopods) 
  ar- 
  

   ticulated 
  to 
  it. 
  

  

  Ceratiocaris 
  acuminata 
  Hall 
  

   (Fig. 
  159) 
  (1859. 
  PciL 
  N, 
  Y, 
  

   3:422, 
  pi. 
  84) 
  

  

  Distinguishing 
  characters. 
  

   Carapace 
  large, 
  tapering 
  in 
  

   front, 
  broad 
  medially 
  and 
  

   rather 
  abruptly 
  truncated 
  on 
  

   posterior 
  margin. 
  Surface 
  with 
  

   very 
  fine, 
  raised 
  longitudinal 
  

   lines. 
  Penultimate 
  segment 
  

   long; 
  telson 
  and 
  cercopods 
  

   short. 
  

  

  Found 
  in 
  the 
  Waterlime 
  

   beds 
  of 
  North 
  Buffalo. 
  

  

  Ceratiocaris 
  (Phasganoca- 
  

   ris?) 
  deweyi 
  Hall 
  (Fig. 
  160) 
  

   Onchus 
  deweyi 
  Hall 
  

   (1852. 
  Pal 
  N. 
  Y. 
  2:320, 
  pi. 
  

  

  71) 
  

  

  Distinguishing 
  characters. 
  

   Large 
  spine 
  of 
  telson 
  only 
  

  

  shell, 
  with- 
  

  

  