﻿New 
  Species 
  of 
  Fossils. 
  97 
  

  

  ated 
  from 
  the 
  glabella 
  by 
  a 
  shallow 
  furrow, 
  merging 
  into 
  the 
  

   fixed 
  cheeks 
  laterally 
  ; 
  occipital 
  node 
  minute, 
  central 
  ; 
  fixed 
  

   cheeks 
  broadly 
  expanded 
  in 
  front, 
  contracting 
  nearly 
  to 
  the 
  

   glabella 
  at 
  the 
  anterior 
  ang]e 
  of 
  the 
  eye; 
  at 
  the 
  posterior 
  mar- 
  

   gin 
  uniting 
  with 
  the 
  occipital 
  segment 
  and 
  forming 
  a 
  lanceo- 
  

   late 
  point 
  extending 
  beyond 
  the 
  outer 
  margin 
  of 
  the 
  eye, 
  and 
  

   curving 
  downward 
  and 
  slightly 
  backward 
  : 
  palpebral 
  lobes 
  

   large, 
  somewhat 
  depressed 
  at 
  the 
  center 
  ; 
  movable 
  cheeks 
  

   sub 
  triangular, 
  crowned 
  by 
  the 
  eye, 
  postero-lateral 
  angles 
  

   with 
  a 
  terminal 
  spine. 
  

  

  Surface 
  ornamented 
  with 
  peculiar 
  elevated 
  tortuous 
  striae. 
  

  

  The 
  cast 
  of 
  a 
  head 
  shows 
  the 
  movable 
  cheeks 
  attached 
  to 
  

   the 
  central 
  portion 
  of 
  the 
  head. 
  Numerous 
  detached 
  movable 
  

   cheeks 
  occur 
  in 
  the 
  same 
  layer 
  with 
  the 
  separated 
  glabella. 
  

  

  Formation 
  and 
  locality. 
  — 
  Black 
  River 
  Limestone, 
  Quarry 
  

   of 
  William 
  Buck, 
  Esq., 
  Russia, 
  Herkimer 
  Co., 
  "N. 
  Y., 
  also, 
  in 
  

   the 
  Trenton 
  Limestone 
  at 
  Quimby's 
  Mill, 
  Lafayette 
  Co., 
  Wis. 
  

  

  ASAPHUS 
  WlSCONSETTSIS 
  U. 
  &p. 
  

  

  Head 
  semicircular, 
  convex 
  ; 
  postero-lateral 
  angles 
  pro- 
  

   duced 
  into 
  strong 
  broad 
  spines; 
  margin 
  broad, 
  slightly 
  con- 
  

   cave, 
  the 
  concavity 
  continuing 
  on 
  the 
  spines. 
  Glabella: 
  central 
  

   portion 
  turbinate, 
  subquadrate 
  in 
  front 
  ; 
  three 
  tubercles 
  occur 
  

   equidistant 
  between 
  the 
  turbinate 
  glabella 
  and 
  occipital 
  seg- 
  

   ment. 
  Occipital 
  segment 
  scarcely 
  defined 
  by 
  a 
  shallow 
  groove 
  ; 
  

   palpebral 
  lobe 
  large, 
  with 
  a 
  depression 
  between 
  the 
  center 
  and 
  

   margin 
  ; 
  fixed 
  cheeks 
  expanded 
  in 
  front, 
  contracting 
  at 
  the 
  

   eye 
  and 
  forming 
  acute 
  points 
  at 
  the 
  posterior 
  margin 
  ; 
  movable 
  

   cheeks 
  subtriangular, 
  crowned 
  by 
  the 
  eye. 
  

  

  Formation 
  and 
  locality. 
  — 
  Same 
  as 
  A. 
  JRomingeri, 
  and 
  also 
  

   found 
  in 
  the 
  Trenton 
  Limestone 
  at 
  Mineral 
  Point 
  and 
  Platts- 
  

   ville, 
  Wis. 
  

  

  This 
  species 
  differs 
  from 
  A. 
  Romingeri 
  by 
  having 
  a 
  wider 
  and 
  

   less 
  concave 
  margin, 
  with 
  the 
  glabella 
  more 
  convex 
  and 
  sub- 
  

   quadrate 
  in 
  front. 
  Varietal 
  differences 
  occur 
  between 
  indi- 
  

   viduals 
  of 
  the 
  same 
  species 
  from 
  New 
  York 
  and 
  Wisconsin 
  ; 
  

   but 
  as 
  far 
  as 
  the 
  specimens 
  at 
  hand 
  indicate, 
  these 
  are 
  not 
  

   of 
  specific 
  importance. 
  

  

  13 
  

  

  