﻿PLATE 
  XIII. 
  

  

  Macrostylocrikus 
  striates 
  Hall. 
  

  

  Page 
  129. 
  

  

  Fig. 
  1. 
  Lateral 
  view 
  of 
  a 
  small 
  individual 
  which 
  shows 
  the 
  striations 
  of 
  the 
  

  

  surface 
  very 
  perfectly. 
  

   Figs. 
  2, 
  3. 
  The 
  posterior 
  and 
  basal 
  views 
  of 
  a 
  larger 
  specimen. 
  The 
  striations 
  

  

  of 
  the 
  surface 
  are 
  not 
  represented 
  in 
  the 
  figure. 
  

   Fig. 
  4. 
  An 
  enlargement 
  of 
  the 
  basal 
  plate 
  and 
  one 
  ray, 
  showing 
  the 
  character 
  

  

  of 
  the 
  surface 
  striae. 
  

  

  Macrostylocrikus 
  fasciatus 
  Hall. 
  

  

  Page 
  130. 
  

   Figs. 
  5, 
  6. 
  Lateral 
  and 
  basal 
  views 
  of 
  a 
  specimen, 
  enlarged 
  two 
  diameters. 
  

  

  Glyptaster 
  occidextalis 
  Hall. 
  

  

  Page 
  133. 
  

  

  Figs. 
  7, 
  8. 
  Basal 
  and 
  lateral 
  views 
  of 
  a 
  small, 
  very 
  perfectly 
  preserved 
  individ- 
  

   ual, 
  enlarged 
  to 
  two 
  diameters. 
  

  

  Fig. 
  9. 
  Two 
  of 
  the 
  rays 
  with 
  the 
  interradial 
  area 
  still 
  farther 
  enlarged 
  to 
  

   show 
  the 
  character 
  of 
  the 
  surface-markings. 
  

  

  Fig. 
  10. 
  The 
  anterior 
  side 
  of 
  a 
  larger 
  specimen, 
  from 
  which 
  the 
  basal 
  plates 
  

   have 
  been 
  removed, 
  and 
  the 
  ridges 
  not 
  developed 
  on 
  the 
  sub- 
  

   radials. 
  

  

  Fig. 
  11. 
  The 
  posterior 
  side 
  of 
  the 
  same 
  specimen 
  as 
  fig. 
  10. 
  

  

  Saccocrlnts 
  Christyi 
  Hall. 
  

  

  Page 
  127. 
  

  

  Fig. 
  12. 
  An 
  enlargement 
  to 
  two 
  diameters 
  of 
  the 
  anal 
  side 
  of 
  a 
  small 
  specimen, 
  

   showing 
  a 
  small 
  number 
  of 
  anal 
  plates. 
  

  

  Fig. 
  13. 
  Antero-lateral 
  view 
  of 
  a 
  larger 
  specimen, 
  on 
  which 
  the 
  surface-striae 
  

   are 
  very 
  perfectly 
  preserved. 
  

  

  Figs. 
  14, 
  15. 
  The 
  right 
  and 
  left 
  sides 
  of 
  another 
  individual. 
  

  

  Fig. 
  16. 
  Anterior 
  side 
  of 
  a 
  larger 
  specimen. 
  

  

  Fig. 
  17. 
  The 
  posterior 
  side 
  showing 
  a 
  larger 
  number 
  of 
  plates 
  than 
  in 
  fig. 
  12. 
  

  

  Figs. 
  18, 
  19. 
  The 
  anterior 
  and 
  anal 
  sides 
  of 
  a 
  large 
  specimen, 
  which 
  is 
  slightly 
  

   imperfect 
  and 
  somewhat 
  obscured 
  by 
  attached 
  bryozoans. 
  

  

  Fig. 
  20. 
  An 
  enlarged 
  ray 
  from 
  specimen 
  fig. 
  13, 
  to 
  show 
  the 
  character 
  of 
  sur- 
  

   face-striae. 
  

  

  