﻿Shells. 
  Fem. 
  ) 
  

  

  151 
  

  

  ting 
  furrov/s.) 
  

   Lithopha^a 
  aristata 
  Dillwyn 
  (pointed, 
  

  

  sharp 
  I 
  with 
  pointed 
  tips 
  at 
  the 
  poste- 
  

   i_ 
  rior 
  end, 
  ) 
  

  

  II. 
  SUPERS 
  AMILY 
  PTSRIACEA 
  

  

  (Gr, 
  pteron, 
  a 
  feather, 
  a 
  wing.) 
  

  

  1 
  . 
  Family 
  Isognomonidae 
  . 
  ( 
  C-r 
  

   carpenter's 
  square, 
  the 
  

  

  Genus 
  Isognom 
  o 
  n 
  So 
  - 
  

   lander 
  178 
  6. 
  "Xsame 
  

   etymology 
  as 
  above. 
  

   Known 
  also 
  as 
  Genu 
  s 
  

   Ped 
  alion 
  Dillwyn 
  

   ^r, 
  pedalion, 
  a 
  

   rudder? 
  is 
  neuter.) 
  

   Isognomon 
  in 
  Latin 
  

   & 
  Greek 
  is 
  masc. 
  ) 
  

  

  isos, 
  equal 
  -^- 
  Gr, 
  & 
  Lat, 
  gnonnon, 
  a 
  

   gnomon 
  or 
  index 
  of 
  a 
  sun-dial.) 
  

  

  I 
  Isognomon 
  alatus 
  Gmeli 
  n 
  (wingedi 
  fan- 
  

  

  ; 
  wing 
  shapedT) 
  

  

  ! 
  Isognomon 
  hicolor 
  C.B.Adams 
  (hicolor, 
  of 
  

  

  i 
  t\70 
  colors 
  . 
  ) 
  

  

  ! 
  Isognomon 
  radia 
  t 
  us 
  Anton 
  (rayed? 
  with 
  ra-! 
  

  

  ""^n 
  — 
  "-^ 
  ~ 
  — 
  — 
  II 
  ^ 
  — 
  ^^ 
  - 
  » 
  

  

  dial 
  stripes.) 
  Formerly 
  listed 
  as 
  Peda 
  - 
  

  

  i 
  lion 
  listeri 
  Hanley 
  (Lister's; 
  named 
  for, 
  

  

  j 
  Martin 
  Lister, 
  an 
  English 
  naturalist, 
  

  

  ' 
  about 
  1638-1712.) 
  

  

  t 
  Isognomon 
  semiauritus 
  Linne 
  (half-eared, 
  

   short-eared, 
  ) 
  

  

  2, 
  Family 
  Pte 
  riidae 
  , 
  

   Shells,) 
  

  

  (Gr. 
  pteron, 
  a 
  feather, 
  a 
  wing. 
  Common 
  name: 
  Wing 
  

  

  a 
  ) 
  Genus 
  Pteria 
  Scopo 
  - 
  

   li 
  177 
  7, 
  (Pteron, 
  

   a 
  wing. 
  Fern, 
  ) 
  

  

  Pteria 
  colymhus 
  Rbding 
  ( 
  a 
  noun 
  meaning 
  a 
  

  

  diver. 
  ; 
  

   Pteria 
  eximi 
  a 
  Reeve 
  (remarkable, 
  uncommon 
  

   Pteria 
  hirundo 
  vitr 
  e 
  a 
  Reeve 
  (hirundo, 
  a 
  

  

  swallow; 
  vitrea, 
  glassy 
  , 
  vitreous; 
  o- 
  

  

  paque 
  white, 
  ) 
  

   P 
  teria 
  squamulosa 
  Lamarck 
  (Lat, 
  squamula, 
  

  

  a 
  little 
  scale; 
  covered 
  with 
  little 
  

  

  scales, 
  ) 
  

   Pteria 
  xanthia 
  S 
  ch 
  v/engel 
  (Gr. 
  xanthos, 
  

   ^yellow; 
  color 
  is 
  yellow.) 
  

  

  ) 
  

  

  b 
  ) 
  Genus 
  Pinctada 
  Ro 
  - 
  

   ding 
  1798. 
  (Etymo 
  - 
  

   logy 
  unknown; 
  may 
  

   be 
  derived 
  from 
  

   Lat. 
  pincta, 
  a 
  pint, 
  

   Fem. 
  ) 
  

  

  c 
  ) 
  Genus 
  Fund 
  ell 
  a 
  Gre 
  - 
  

   gori 
  o_1884 
  TTciDii 
  nu- 
  

   tive 
  of 
  Lat, 
  funda, 
  

   a 
  sling, 
  purse 
  , 
  

   drag-net, 
  Fem.) 
  

  

  ! 
  Pinctada 
  radiata 
  Leach 
  (rayed; 
  shell 
  has 
  

   radiating 
  rows 
  of 
  scales. 
  ) 
  (This 
  genus 
  is 
  

   also 
  listed 
  as 
  Genus 
  Margaritifera 
  Schu 
  - 
  

  

  j 
  macher 
  (pearl 
  bearing; 
  the 
  shell 
  is 
  

   very 
  pearly,) 
  

  

  Fundell 
  a 
  cande 
  an 
  a 
  Orbigny 
  (named 
  for 
  Fer- 
  

   dinand 
  de 
  Cande, 
  a 
  French 
  naval 
  officer 
  

   who 
  collected 
  shells 
  in 
  the 
  Test 
  Indies.) 
  

  

  3. 
  Family 
  Pin 
  nidae. 
  (Lat. 
  pinna, 
  same 
  as 
  penna, 
  a 
  feather, 
  wing. 
  Word 
  

   used 
  by 
  Cicero, 
  Pliny 
  for 
  a 
  kind 
  of 
  mussel. 
  V/edge-shaped, 
  Common 
  

   nar.ie; 
  Sea 
  Pen 
  Shells,) 
  

  

  a) 
  Genus 
  Pin 
  na 
  Linne 
  

   1758,(Fem7y 
  

  

  { 
  Pinna 
  carnea 
  Gmelin 
  (flesh-colored; 
  light 
  

   I 
  orange 
  color 
  .;( 
  Pinna 
  rud 
  i 
  s 
  Linne 
  (rough, 
  

   rugged) 
  is 
  not 
  from 
  the 
  Western 
  AtlanticP 
  

  

  