﻿226 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  Genus 
  bronteus 
  Goldfuss 
  

  

  [Ety. 
  : 
  mythologic 
  name] 
  

  

  (1839. 
  Nova 
  act. 
  phys. 
  med. 
  caes. 
  Leop. 
  Carol. 
  Nat. 
  curios. 
  19 
  :^6o) 
  

  

  Dorsal 
  shield 
  broadly 
  elliptic, 
  with 
  the 
  cephalon 
  less 
  than 
  one 
  

   third 
  the 
  entire 
  length; 
  glabella 
  rapidly 
  expanding 
  in 
  front, 
  with 
  

   faint 
  lobations. 
  Thorax 
  of 
  10 
  segments, 
  Pygidium 
  longer 
  than 
  

   cephalon 
  or 
  thorax, 
  with 
  a 
  short 
  axis 
  and 
  radiating 
  furrows 
  extend- 
  

   ing 
  from 
  it 
  across 
  the 
  broad 
  limb. 
  Margin 
  generally 
  entire. 
  

  

  Fig. 
  153 
  Bronteus 
  niagarensis; 
  pygidium 
  

  

  Bronteus 
  niagarensis 
  Hall 
  (Fig. 
  158) 
  (1852. 
  Pal. 
  N. 
  Y. 
  2:314, 
  

   pi. 
  70) 
  

  

  Distinguishing 
  characters. 
  Pygidium 
  only 
  known; 
  broad 
  and 
  

   somewhat 
  semicircular; 
  short 
  axis 
  and 
  from 
  six 
  to 
  nine 
  long 
  curv- 
  

   ing 
  furrows 
  or 
  sulcations 
  on 
  either 
  side 
  of 
  the 
  center. 
  

  

  Found 
  in 
  " 
  a 
  large 
  fragment 
  of 
  limestone 
  in 
  che 
  Niagara 
  river 
  

   below 
  the 
  Canada 
  fall 
  " 
  (Hall). 
  

  

  Order 
  phyllocarida 
  Packard^ 
  

  

  Crustacea 
  with 
  the 
  body 
  composed 
  of 
  five 
  cephalic, 
  eight 
  thoracic, 
  

   and 
  two 
  to 
  eight 
  abdominal 
  segments. 
  Heajd 
  and 
  thorax 
  covered 
  

   by 
  a 
  thin 
  chitinous 
  or 
  semicalcareous 
  single 
  or 
  bivalved 
  shell 
  or 
  

   carapace. 
  A 
  narrow 
  movable 
  plate 
  or 
  rostrum 
  lies 
  in 
  front 
  of 
  the 
  

   caparace. 
  Two 
  pairs 
  of 
  antennae 
  and 
  stalked 
  compound 
  eyes 
  

   present. 
  Thoracic 
  segments 
  with 
  soft 
  leaf-like 
  legs. 
  Abdomen 
  

   often 
  ending 
  in 
  spiniform 
  telson, 
  provided 
  with 
  lateral 
  spines. 
  

  

  ^This 
  section 
  was 
  revised 
  by 
  Prof. 
  John 
  M. 
  Clarke, 
  who 
  also 
  prepared 
  the 
  

   synopsis 
  of 
  species 
  and 
  synonymy. 
  

  

  