﻿130 
  Twenty-eighth 
  Eeport 
  on" 
  the 
  State 
  Museum. 
  

  

  first 
  radial 
  which 
  supports 
  the 
  arm 
  is 
  not 
  so 
  marked 
  and 
  

   is 
  more 
  angular. 
  There 
  is 
  likewise 
  a 
  slight 
  angularity 
  of 
  the 
  

   body 
  at 
  the 
  base 
  of 
  the 
  radial 
  plates, 
  and 
  the 
  base 
  of 
  the 
  calyx 
  

   at 
  its 
  junction 
  with 
  the 
  column 
  is 
  trilobate. 
  The 
  arms 
  are 
  

   long 
  and 
  slender 
  and 
  are 
  not 
  observed 
  to 
  bifurcate 
  above 
  the 
  

   summit 
  of 
  the 
  calyx. 
  In 
  a 
  specimen 
  having 
  a 
  height 
  of 
  calyx 
  

   of 
  5 
  mm. 
  the 
  length 
  of 
  the 
  arms 
  is 
  21 
  mm. 
  

  

  Macrostylocrinus 
  fasciatus. 
  

  

  Plate 
  13, 
  Figs. 
  5, 
  6. 
  

  

  Cyathocrinus 
  fasciatus 
  Hall.. 
  Doc. 
  Edit. 
  28th 
  Rep. 
  St. 
  Mus. 
  Nat. 
  Hist. 
  Expla- 
  

   nation 
  of 
  pi. 
  13, 
  figs. 
  5, 
  6. 
  1876. 
  

  

  Body 
  rotund, 
  calyx 
  symmetrically 
  cup-shaped 
  ; 
  basal 
  plates 
  

   apparently 
  three 
  (not 
  satisfactorily 
  determined) 
  closely 
  anchy- 
  

   losed, 
  and 
  supporting 
  five 
  hexagonal 
  first 
  radial 
  plates 
  ; 
  upper 
  

   side 
  of 
  the 
  first 
  radial 
  shortly 
  truncated 
  and 
  supporting 
  a 
  

   small 
  second 
  radial, 
  which 
  in 
  direct 
  line 
  supports 
  a 
  smaller 
  

   one, 
  from 
  the 
  upper 
  sloping 
  sides 
  of 
  which 
  proceed 
  two 
  small 
  

   arms. 
  The 
  first 
  radial 
  plates, 
  on 
  their 
  adjacent 
  sloping 
  faces, 
  

   support 
  a 
  heptagonal 
  interradial 
  plate, 
  above 
  and 
  adjacent 
  to 
  

   which 
  are 
  three 
  other 
  interradials 
  not 
  fully 
  determined. 
  

  

  Surface 
  granulose- 
  striate, 
  the 
  striae 
  sometimes 
  in 
  strong 
  fas- 
  

   cicles, 
  to 
  the 
  almost 
  entire 
  exclusion 
  of 
  granulse. 
  Fascicles 
  of 
  

   strise 
  radiating 
  from 
  the 
  basal 
  plates 
  to 
  the 
  margins 
  of 
  the 
  plates 
  

   above 
  and 
  uniting 
  in 
  a 
  prominent 
  stellate 
  arrangement 
  on 
  the 
  

   centers 
  of 
  the 
  first 
  radial 
  plates. 
  From 
  the 
  center 
  of 
  the 
  first 
  

   radial 
  plates 
  upward 
  proceeds 
  a 
  distinct 
  rounded 
  ridge 
  which 
  

   extends 
  to 
  the 
  third 
  radial 
  where 
  it 
  bifurcates 
  to 
  the 
  arm 
  

   plates. 
  

  

  Height 
  of 
  body 
  to 
  bifurcation 
  of 
  the 
  arms 
  9-11 
  mm. 
  Diam- 
  

   eter 
  of 
  cup 
  7-8 
  mm. 
  Column 
  at 
  base 
  1.5 
  mm. 
  

  

  The 
  structure 
  of 
  the 
  body 
  above 
  the 
  base 
  is 
  that 
  of 
  the 
  

   simplest 
  form 
  of 
  Actinoc 
  rictus, 
  but 
  without 
  any 
  distinctive 
  

  

  