﻿The 
  Fauxa 
  op 
  the 
  Niagaka 
  Group. 
  195 
  

  

  Dalmanites 
  verrucosus. 
  

  

  Plate 
  33, 
  Figs. 
  5-17; 
  PI. 
  34, 
  Figs. 
  13-15. 
  

  

  Dalmatna 
  verrucosa 
  Hall. 
  Trans. 
  Alb. 
  Inst., 
  vol. 
  iv, 
  p. 
  218. 
  Abstract, 
  p. 
  24; 
  

   May, 
  1863. 
  

  

  General 
  form 
  elongate-ovate, 
  the 
  greatest 
  breadth 
  across 
  

   the 
  posterior 
  part 
  of 
  the 
  cephalic 
  shield. 
  

  

  Head 
  semicircular, 
  or, 
  including 
  the 
  lateral 
  spines 
  which 
  

   reach 
  to 
  the 
  base 
  of 
  the 
  fifth 
  thoracic 
  segment, 
  broad 
  crescenti- 
  

   form, 
  the 
  anterior 
  margin 
  produced 
  in 
  front 
  of 
  the 
  glabella, 
  

   forming 
  a 
  semicircular 
  projecting 
  border 
  about 
  one- 
  seventh 
  as 
  

   wide 
  as 
  the 
  greatest 
  width 
  of 
  the 
  glabella. 
  Glabella 
  convex, 
  

   not 
  very 
  prominent, 
  the 
  greatest 
  breadth 
  about 
  equal 
  to 
  the 
  

   length 
  forward 
  of 
  the 
  occipital 
  furrow. 
  Anterior 
  lobe 
  trans- 
  

   versely 
  oval, 
  about 
  twice 
  as 
  wide 
  as 
  the 
  posterior 
  lobe, 
  sepa- 
  

   rated 
  from 
  the 
  rest 
  by 
  a 
  pair 
  of 
  rather 
  deep, 
  obliquely 
  trans- 
  

   verse 
  furrows, 
  which 
  extend 
  about 
  four-fifths 
  across 
  the 
  glab- 
  

   ella. 
  Posterior 
  and 
  middle 
  furrows 
  short, 
  but 
  deeply 
  marked, 
  

   not 
  extending 
  to 
  the 
  margins 
  of 
  the 
  glabella. 
  Occipital 
  furrow 
  

   narrow 
  and 
  shallow, 
  more 
  deeply 
  marked 
  in 
  its 
  continuation 
  

   in 
  the 
  cheek 
  furrows. 
  Eyes 
  large, 
  prominent, 
  having 
  in 
  their 
  

   greatest 
  elevation, 
  nine 
  or 
  ten 
  ranges 
  of 
  lenses, 
  and 
  thirty-five 
  

   ranges 
  in 
  the 
  other 
  direction. 
  Palpebral 
  lobe 
  depressed, 
  

   giving 
  great 
  prominence 
  to 
  the 
  rim 
  of 
  the 
  eye. 
  Lobes 
  of 
  the 
  

   cheeks 
  rather 
  prominent 
  : 
  marginal 
  rim 
  broad, 
  the 
  lateral 
  por- 
  

   tions 
  having 
  a 
  rounded, 
  undefined 
  ridge 
  near 
  the 
  inner 
  border. 
  

  

  Thorax 
  with 
  the 
  axial 
  lobe 
  depressed-convex, 
  widest 
  at 
  the 
  

   fourth 
  and 
  fifth 
  segments, 
  its 
  greatest 
  width 
  not 
  exceeding 
  

   two-thirds 
  that 
  of 
  the 
  lateral 
  lobe 
  ; 
  the 
  articulations 
  curve 
  

   forward 
  in 
  the 
  middle 
  and 
  at 
  their 
  junction 
  with 
  the 
  lateral 
  

   lobes 
  ; 
  articulations 
  of 
  the 
  lateral 
  lobes 
  marked 
  by 
  a 
  deep 
  

   longitudinal 
  furrow 
  which 
  commences 
  at 
  the 
  juncture 
  of 
  the 
  

   anterior 
  margin 
  with 
  the 
  axial 
  lobe, 
  and 
  is 
  directed 
  back- 
  

   ward, 
  leaving 
  the 
  lower 
  portion 
  of 
  the 
  articulation 
  about 
  

   one 
  third 
  of 
  the 
  whole 
  width 
  at 
  the 
  middle 
  of 
  the 
  length, 
  and 
  

   again 
  runs 
  out 
  on 
  the 
  upper 
  margin, 
  at 
  the 
  point 
  where 
  the 
  

   articulation 
  is 
  bent 
  abruptly 
  backward. 
  

  

  Pygidium 
  broadly 
  triangular, 
  the 
  anterior 
  lateral 
  angles 
  

   rounded 
  and 
  the 
  lateral 
  borders 
  convex 
  ; 
  axial 
  lobe 
  regularly 
  

   tapering 
  posteriorly, 
  marked 
  by 
  thirteen 
  annulations 
  which 
  

  

  