﻿Genera 
  of 
  Recent 
  Glypeastroids. 
  G05 
  

  

  Arachnoides, 
  Leske, 
  1778. 
  Add. 
  ad 
  Klein, 
  pp. 
  8 
  & 
  154. 
  Type, 
  Arach- 
  

   noidcs 
  echinarachnius, 
  Leske, 
  I. 
  c.,= 
  Echinus 
  placenta, 
  Linne, 
  1758, 
  

   Syst. 
  Nat. 
  ed. 
  10, 
  p. 
  660. 
  Monotypic. 
  

  

  Laganum, 
  Gray, 
  1825. 
  Ann. 
  Phil. 
  x. 
  y. 
  5 
  (Lagana, 
  by 
  error). 
  Type, 
  

   Eclnnodiscus 
  laganum, 
  Leske, 
  1778, 
  Add. 
  ad 
  Klein, 
  p. 
  140,= 
  

   Laganum 
  bonani, 
  Agassiz, 
  1841, 
  and 
  later 
  writers. 
  Type 
  by 
  

   tautonomy. 
  

  

  Peronella, 
  Gray, 
  1855. 
  Cat. 
  Recent 
  Ech. 
  pt. 
  i. 
  p. 
  13. 
  Type, 
  Laganum 
  

   peronii, 
  Agassiz, 
  1841, 
  Mon. 
  Scut. 
  p. 
  123. 
  Monotypic. 
  Proposed 
  

   as 
  a 
  subgenus. 
  

  

  Fibularia, 
  Lamarck, 
  1816. 
  Anim. 
  s. 
  Vert. 
  iii. 
  p. 
  16. 
  Type, 
  Fibularia 
  

   trigona, 
  Lamarck, 
  /. 
  c.,= 
  Echinocyamus 
  craniolaris, 
  Leske, 
  1778, 
  

   Add. 
  ad 
  Klein, 
  p. 
  150. 
  Type 
  fixed 
  by 
  elimination 
  by 
  Agassiz 
  

   and 
  Desor, 
  1847, 
  Ann. 
  Sci. 
  Nat. 
  (3) 
  vii. 
  p. 
  142. 
  Since 
  Agassiz 
  

   and 
  Desor's 
  work 
  permits 
  either 
  trigona 
  or 
  ovulum 
  to 
  be 
  the 
  type, 
  

   I 
  will 
  designate 
  the 
  former, 
  although 
  I 
  have 
  no 
  doubt 
  both 
  are 
  

   synonyms 
  of 
  Leslie's 
  Echinocyamus 
  craniolaris. 
  

  

  Echinocyamus, 
  Leske, 
  1778. 
  Add. 
  ad 
  Klein, 
  p. 
  149. 
  Type, 
  Echino- 
  

   cyamus 
  angulosus, 
  Leske, 
  op. 
  cit. 
  p. 
  151, 
  = 
  Echinus 
  minutus. 
  Pallas, 
  

   1774, 
  Spic. 
  Zool. 
  x. 
  (usually 
  quoted 
  erroneously 
  as 
  ix.) 
  p. 
  34, 
  pi. 
  i. 
  

   fig. 
  25, 
  as 
  delimited 
  by 
  Leske, 
  op. 
  cit. 
  pp. 
  150-152. 
  Type 
  fixed 
  by 
  

   elimination 
  by 
  Agassiz 
  and 
  Desor, 
  1847, 
  Ann. 
  Sci. 
  Nat. 
  (3) 
  vii. 
  

   p. 
  140. 
  

  

  Alexandria, 
  PfefFer, 
  1881. 
  Verhandl. 
  Naturw, 
  Ver. 
  Hamburg 
  von 
  

   1880, 
  p. 
  63. 
  Type, 
  Alexandria 
  magnified, 
  Pfefier, 
  op. 
  cit. 
  p. 
  64. 
  

   Monotypic. 
  

  

  Scutella, 
  Lamarck, 
  1816. 
  Anim. 
  s. 
  Vert. 
  iii. 
  p. 
  7. 
  Type, 
  Echinodiscus 
  

   subrotundus, 
  Leske, 
  1778, 
  Add. 
  ad 
  Klein, 
  p. 
  142. 
  Type 
  fixed 
  by 
  

   elimination 
  by 
  Agassiz, 
  1841, 
  Mon. 
  Scut. 
  p. 
  76. 
  

  

  Echinarachnius, 
  Gray, 
  1825. 
  Ann. 
  Phil. 
  x. 
  p. 
  6. 
  Type, 
  Scutella 
  

   parma, 
  Lamarck," 
  1816, 
  Anim. 
  s. 
  Vert. 
  iii. 
  p. 
  11. 
  Type 
  fixed 
  by 
  

   elimination 
  by 
  Agassiz, 
  1841, 
  Mon. 
  Scut. 
  p. 
  89. 
  

  

  Dendraster, 
  Agassiz 
  and 
  Desor, 
  1847. 
  Ann. 
  Sci. 
  Nat. 
  (3) 
  vii. 
  p. 
  135. 
  

   Type, 
  Scutella 
  excentrica, 
  Eschscholtz, 
  1831, 
  Zool. 
  Atlas, 
  p. 
  19. 
  

   Monotypic. 
  

  

  Echinodiscus, 
  Leske, 
  1778. 
  Add. 
  ad 
  Klein, 
  p. 
  131. 
  Type, 
  Echino- 
  

   discus 
  bisperforalus, 
  Leske, 
  op. 
  cit. 
  p. 
  132. 
  Type 
  limited 
  by 
  

   Agassiz, 
  1841, 
  Mon. 
  Scut. 
  p. 
  62 
  (under 
  name 
  Lobophora), 
  to 
  either 
  

   bisperforalus, 
  auritus, 
  or 
  inauritus 
  of 
  Leske, 
  and 
  the 
  first, 
  in 
  the 
  

   form 
  of 
  its 
  second 
  variety, 
  has 
  been 
  selected 
  by 
  me 
  in 
  the 
  present 
  

   paper, 
  p. 
  597. 
  

  

  Astriclypeus, 
  Verrill, 
  1867. 
  Trans. 
  Conn. 
  Acad. 
  i. 
  p. 
  311. 
  Type, 
  

   Astriclypeus 
  manni, 
  Verrill, 
  I. 
  c. 
  Monotypic. 
  

  

  Eucope, 
  Agassiz, 
  1841 
  . 
  Mon. 
  Scut. 
  p. 
  45. 
  Type, 
  Echinodiscus 
  emar- 
  

   ginatus, 
  Leske, 
  1778, 
  Add. 
  ad 
  Klein, 
  p. 
  136. 
  Type 
  fixed 
  in 
  the 
  

   present 
  paper, 
  p. 
  599. 
  

  

  Mellita, 
  Agassiz, 
  1841. 
  Mon. 
  Scut. 
  p. 
  34. 
  Type, 
  Echinodiscus 
  quin- 
  

   quiesperforatus, 
  Leske, 
  1778, 
  Add. 
  ad 
  Klein, 
  p. 
  133. 
  Type 
  fixed 
  

   in 
  the 
  present 
  paper, 
  p. 
  599. 
  

  

  Rotula, 
  Agassiz, 
  1841. 
  Mon. 
  Scut. 
  p. 
  23. 
  Type, 
  Echinus 
  orbiculus, 
  

   Linne, 
  1758, 
  Syst. 
  Nat. 
  ed. 
  10, 
  p. 
  266, 
  as 
  delimited 
  by 
  Leske, 
  

   1778, 
  Add. 
  ad 
  Klein, 
  pp. 
  133, 
  144, 
  146, 
  = 
  Rotula 
  rumphii, 
  Agassiz, 
  

   1841, 
  and 
  later 
  writers. 
  Type 
  by 
  virtual 
  tautonomy. 
  

  

  Cambridge, 
  Mass., 
  

   March 
  1911. 
  

  

  