﻿62 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  67 
  

  

  times 
  the 
  anterior) 
  larger 
  than 
  the 
  others; 
  primibrachs 
  usually 
  one, 
  

   that 
  of 
  the 
  lateral 
  rays 
  unsymmetric, 
  and 
  supporting 
  on 
  the 
  longer 
  

   articular 
  face 
  a 
  greatly 
  hypertrophied 
  arm. 
  Arms 
  ten, 
  unequal, 
  

   uniserial, 
  brachials 
  mostly 
  quadrangular; 
  pinnules 
  small 
  and 
  closely 
  

   packed. 
  Ventral 
  sac 
  unknown, 
  probably 
  inconspicuous 
  or 
  wanting. 
  

  

  Distribution. 
  — 
  Carboniferous, 
  Chester 
  to 
  Pennsylvanian. 
  

  

  There 
  must 
  now 
  be 
  added 
  to 
  the 
  list 
  of 
  species 
  given 
  above 
  : 
  

  

  AGASSIZOCRINUS 
  INEQUIDACTYLUS 
  (Whitfield) 
  

  

  Cyathocriwus 
  inequidactylus, 
  Ann. 
  New 
  York 
  Acad. 
  Sci., 
  vol. 
  2, 
  1882, 
  p. 
  

  

  219, 
  pi. 
  9, 
  figs. 
  5-8. 
  

   Cyathocrinus 
  maxvillensis 
  Whitfield, 
  Ann. 
  New 
  York 
  Acad. 
  Sci., 
  vol. 
  5, 
  

  

  1891, 
  p. 
  557, 
  pi. 
  13, 
  figs. 
  5-8 
  ; 
  Geol. 
  Surv. 
  Ohio, 
  vol. 
  7, 
  1893, 
  p. 
  465, 
  pi. 
  

  

  9, 
  figs. 
  5-8.— 
  Morse, 
  Proc. 
  Ohio 
  State 
  Acad. 
  Sci., 
  vol. 
  5, 
  1911, 
  p. 
  361, 
  

  

  362, 
  figs. 
  3a-d. 
  

  

  Belongs 
  to 
  the 
  subcorneal 
  type, 
  of 
  medium 
  size, 
  and 
  well 
  character- 
  

   ized 
  by 
  a 
  low 
  cone 
  of 
  perfectly 
  divided 
  infrabasals 
  and 
  a 
  strong 
  

   <3 
  stem. 
  Highest 
  part 
  of 
  the 
  Chester, 
  Max- 
  

  

  aD 
  qQ 
  £7/v 
  ville 
  limestone 
  (upper 
  zone) 
  and 
  Glen 
  

   () 
  0/~\ 
  < 
  T 
  _ 
  ) 
  Dean 
  formations. 
  Type 
  locality 
  near 
  

  

  Newtonville, 
  Clermont 
  County, 
  Ohio; 
  

   also 
  occurs 
  at 
  Sloan's 
  Valley, 
  Pulaski 
  

   County, 
  Grayson 
  Springs, 
  Grayson 
  

   nOA 
  | 
  f/\j 
  ( 
  /r\\l 
  County, 
  and 
  Stephensport, 
  Brecken- 
  

   UI3VJ 
  ^-><— 
  ' 
  ^/V 
  rid 
  g 
  e 
  County, 
  all 
  in 
  Kentucky, 
  but 
  has 
  

   f 
  J 
  not 
  been 
  reported 
  from 
  the 
  equivalent 
  

  

  ^ 
  J 
  Okaw 
  of 
  the 
  southern 
  Illinois 
  area. 
  

  

  ^^ 
  Like 
  many 
  other 
  species 
  of 
  the 
  Glen 
  

  

  fig. 
  1. 
  analysis 
  of 
  calyx 
  of 
  Dean 
  formation 
  this 
  is 
  a 
  wide 
  ranging 
  

  

  AGASSIZOCHINUS 
  „ 
  -_ 
  it 
  ■ 
  ttti 
  -,n 
  1 
  n 
  

  

  form. 
  In 
  addition 
  to 
  Whitfield 
  s 
  types 
  

   from 
  Ohio, 
  four 
  specimens 
  have 
  been 
  found 
  at 
  three 
  widely 
  sepa- 
  

   rated 
  localities 
  in 
  Kentucky, 
  all 
  from 
  the 
  uppermost 
  beds 
  of 
  the 
  

   Chester; 
  they 
  are 
  figured 
  on 
  plate 
  15. 
  The 
  nearly 
  conical 
  contour 
  

   of 
  the 
  calyx 
  and 
  low 
  infrabasal 
  cone 
  are 
  constant 
  in 
  all. 
  

  

  While 
  I 
  am 
  not 
  essaying 
  a 
  critical 
  review 
  of 
  the 
  species 
  of 
  

   Agassizocriniis, 
  yet 
  in 
  view 
  of 
  its 
  profuse 
  occurrence 
  and 
  wide 
  dis- 
  

   tribution, 
  and 
  the 
  desirability 
  of 
  having 
  the 
  status 
  of 
  the 
  species 
  

   fixed 
  as 
  far 
  as 
  possible, 
  I 
  will 
  attempt 
  briefly 
  to 
  summarize 
  our 
  

   information 
  regarding 
  them: 
  

  

  Of 
  the 
  seventeen 
  described 
  species 
  (including 
  Whitfield's 
  and 
  a 
  

   new 
  species), 
  two-thirds 
  of 
  which 
  are 
  based 
  upon 
  specimens 
  from 
  

   the 
  vicinity 
  of 
  Chester, 
  Illinois, 
  three 
  may 
  be 
  excluded 
  from 
  con- 
  

   sideration 
  because 
  not 
  sufficiently 
  defined 
  to 
  show 
  more 
  than 
  generic 
  

   characters, 
  namely: 
  A. 
  dactyliformis 
  Shumard, 
  A. 
  turaidus 
  Owen 
  

   and 
  Shumard, 
  and 
  A. 
  carbonarius 
  Worthen. 
  

  

  