﻿161 
  1 
  

  

  Thya 
  sira 
  i 
  n 
  aegualis 
  Verrill 
  & 
  Bu 
  sh 
  (une- 
  i 
  

  

  qual; 
  with 
  the 
  anterior 
  end 
  much 
  the 
  lon- 
  

  

  & 
  Bush 
  ( 
  remark-i 
  

  

  Genus 
  Thyasira 
  La 
  - 
  

   marck 
  181 
  8. 
  (Proba- 
  

   bly 
  derived 
  from 
  

   Thyas, 
  a 
  "bacchante, 
  

   a 
  feciale 
  votary 
  of 
  

   Bacchus, 
  ) 
  Formerly 
  

   called 
  Genus 
  Cry 
  p- 
  

   1 
  don 
  Turton 
  182 
  2 
  . 
  

   {^r. 
  crj'-ptos, 
  hidden 
  

   -I- 
  odous, 
  odont-, 
  

   tooth; 
  it 
  has 
  no 
  

   distinct 
  teeth 
  in 
  

   either 
  valve. 
  ) 
  (^eni*) 
  

  

  ger.) 
  

  

  T 
  hyasira 
  insignis 
  Verrill 
  

  

  able, 
  distinguished; 
  shell 
  unusually 
  \ 
  

  

  large 
  and 
  thick 
  for 
  the 
  genus.) 
  j 
  

  

  Thyasira 
  ovoidea 
  Pall 
  (egg-shaped.) 
  j 
  

  

  Thyasira 
  plana 
  Verrill 
  & 
  Bush 
  (even, 
  lev-i 
  

  

  b) 
  Genus 
  Thyasira 
  La 
  - 
  j 
  el, 
  flat; 
  the 
  length 
  and 
  height 
  about 
  { 
  

  

  equal.) 
  I 
  

  

  Thyasira 
  plicata 
  Verrill 
  (plaited; 
  with 
  i 
  

   plications 
  or 
  folds 
  . 
  ) 
  i 
  

  

  Thyasira 
  rotunda 
  Jeffreys 
  (round, 
  circu- 
  j 
  

   lar. 
  ) 
  

  

  Thyasira 
  sarsi 
  Philippi 
  ( 
  Sar 
  s 
  ' 
  . 
  ) 
  

  

  Thyasira 
  trisinuata 
  Orbigny 
  (with 
  three 
  

   grooves. 
  ) 
  

  

  Thya 
  s 
  ira 
  tortu 
  o 
  sa 
  Jeffreys 
  (twisted, 
  tor- 
  

   tuous 
  .1 
  

  

  Thyasira 
  brevis 
  Verrill 
  & 
  Bu 
  sh 
  (small, 
  

   short; 
  length 
  only 
  2 
  1/3 
  mmTT 
  

  

  Thyasira 
  cycladi 
  a 
  S. 
  lyoo 
  d 
  ( 
  G 
  r 
  , 
  cy 
  c 
  la 
  s 
  , 
  

   cyclad-, 
  round, 
  circular.) 
  

  

  Thyasira 
  ellipt 
  ica 
  Verrill 
  & 
  Bus 
  h 
  (ellip- 
  

   tical; 
  shell 
  transversely 
  elliptical 
  and 
  

   somewhat 
  oblong.) 
  

  

  Thyasira 
  eumyari 
  a 
  M. 
  S 
  ars 
  ( 
  Gr 
  , 
  eu 
  , 
  well, 
  

   good 
  -»- 
  mya, 
  a 
  clam. 
  J 
  

  

  Thya 
  s 
  ira 
  fer 
  r 
  uginosa 
  Forbes 
  (Lat 
  .ferrugo, 
  

   iron 
  rust; 
  incrusted 
  with 
  ferruginous 
  

   mud; 
  iron 
  rust 
  colored.) 
  

  

  Thyasira 
  pygmaea 
  Ve 
  rrill 
  & 
  Bush 
  (pygmy; 
  

   shell 
  minute, 
  about 
  1.6 
  mm.l 
  

  

  Thyasira 
  simplex 
  Verrill 
  & 
  Bus 
  h 
  ( 
  s 
  i 
  mp 
  1 
  e 
  , 
  

   plain; 
  "this 
  species 
  is 
  remarkable 
  for 
  

   the 
  plainness 
  of 
  its 
  surface 
  and 
  the 
  sim 
  

   plicity 
  of 
  its 
  hinge." 
  Verrill 
  & 
  Bush.) 
  

  

  Thyasira 
  subovata 
  Jeffreys 
  ( 
  s 
  omewhat 
  

   ovate. 
  1 
  

  

  Thyasira 
  succisa 
  Jeffreys 
  (cut 
  off.) 
  

  

  c 
  ) 
  Genus 
  Lep 
  t 
  axinus 
  V 
  er- 
  | 
  Leptaxinus 
  incrassatus 
  Jeffreys 
  ( 
  thi 
  cken- 
  

   ri 
  ll 
  & 
  Bus 
  h 
  189 
  8. 
  (Gr.' 
  ed, 
  made 
  thick. 
  1 
  

  

  leptos, 
  small, 
  thin 
  ! 
  Leptaxinus 
  minutus 
  Verrill 
  & 
  Bu 
  sh 
  (shell 
  

   -I- 
  axine, 
  an 
  ax.Masc^i 
  minute, 
  length 
  about 
  2 
  mm. 
  ) 
  

  

  d 
  ) 
  G 
  enus 
  Axinopsis 
  G.O 
  . 
  

   Sars 
  1 
  87 
  8. 
  (Gr. 
  axine, 
  

   an 
  ax 
  -.- 
  opsis, 
  as- 
  

   pect, 
  appearance. 
  

   Looks 
  like 
  an 
  ax.Fem.) 
  

  

  Axinopsis 
  cordata 
  Verrill 
  & 
  Bush 
  ( 
  shell 
  

   rounded 
  or 
  somev/hat 
  cordate.; 
  | 
  

  

  Axino 
  psis 
  orbiculata 
  G.O. 
  Sar 
  s 
  (nearly 
  cir}- 
  

   cular, 
  evenly 
  rounded.] 
  [ 
  

  

  Axinopsis 
  orbiculata 
  ina 
  e 
  qualis 
  Ver 
  rill 
  & 
  

  

  Bus 
  h 
  (unequal; 
  "specimens 
  of 
  this 
  specie^ 
  

   show 
  considerable 
  variation 
  in 
  form 
  and 
  

   character 
  of 
  the 
  hinge 
  . 
  ''Verrill 
  & 
  Bush.) 
  

  

  2. 
  Family 
  Lucinidae 
  . 
  (Lat. 
  Lucina, 
  the 
  goddess 
  of 
  childbirth, 
  Juno.) 
  

  

  i 
  Lucina 
  pensylvanica 
  Linne 
  (this 
  is 
  Linne'd 
  

   ! 
  spelling; 
  Pennsylvania; 
  found 
  from 
  Cape 
  ■, 
  

  

  