﻿m) 
  Genus 
  Dosinia 
  Sco 
  po- 
  

   li 
  1777 
  7TFrom 
  the 
  

   Senegalese 
  Dosin, 
  

   name 
  of 
  this 
  type 
  of 
  

   shell! 
  described 
  hy 
  

   Adanson, 
  1757, 
  rem.) 
  

  

  n) 
  Genus 
  Cyclina 
  Des 
  - 
  

   hayes 
  18 
  50 
  ,(Gr 
  . 
  cy- 
  

   clos, 
  a 
  circle, 
  ring; 
  

   also 
  called 
  Cycli 
  - 
  

   nella 
  Pall 
  19027 
  rA 
  

   diminutive 
  of 
  Cycli- 
  

   na; 
  a 
  small 
  ring.) 
  

   Shell 
  is 
  suborbicu- 
  

   lar. 
  Fern.) 
  

  

  170 
  i 
  

  

  Dosinia 
  concentrica 
  Born 
  (concentric; 
  de-| 
  

   corated 
  v/ith 
  concentric 
  ridges.) 
  j 
  

   Dosinia 
  discus 
  Reev 
  e 
  (a 
  disc. 
  Shell 
  re- 
  ; 
  

   minds 
  one 
  of 
  a 
  disc 
  by 
  its 
  circular 
  out- 
  

   line 
  and 
  flat 
  shape,) 
  

   Dosinia 
  elegans 
  Conrad 
  (elegant.) 
  

  

  J 
  Cyclina 
  tenuis 
  Recluz 
  (small, 
  fine, 
  deli- 
  

   i 
  cate 
  . 
  ) 
  

  

  o) 
  

  

  Genus 
  Gemma 
  Deshay 
  es 
  

   1855 
  . 
  (Lat. 
  a 
  gem, 
  a 
  

   jewel. 
  Surface 
  shi- 
  

   ning; 
  color 
  pale 
  la- 
  

   vender; 
  interior: 
  

   white 
  and 
  purple. 
  

   Called 
  the 
  Amethys- 
  

   tine 
  Gem, 
  Fem. 
  ) 
  

  

  j 
  Gemma 
  gemma 
  Totten 
  ( 
  gemlike 
  . 
  ) 
  

   Gemma 
  ge 
  mma 
  manhattanensis 
  Prime 
  ( 
  found 
  

   i 
  in 
  East 
  River, 
  Manhattan, 
  New 
  York, 
  neari 
  

   I 
  Hell 
  Gate.) 
  

  

  i 
  Gemma 
  purpurea 
  H.C.Le 
  a 
  ( 
  purplish; 
  "yellow- 
  

   ish, 
  v;hite 
  or 
  rosy 
  with 
  the 
  umbones 
  and 
  

   ; 
  posterior 
  end 
  usually 
  amethyst 
  color." 
  

   ' 
  (Austin 
  C. 
  Apgar.) 
  

  

  ! 
  Gemma 
  fretensis 
  Rehder 
  (from 
  a 
  sound, 
  a 
  

   '_ 
  channel; 
  collected 
  in 
  Long 
  Island 
  Sound.") 
  

  

  P) 
  

  

  Genus 
  Parastarte 
  Con 
  - 
  ,- 
  

   rad 
  1862. 
  (Gr, 
  para. 
  

  

  beside, 
  near 
  -i- 
  As- 
  

   tarte; 
  close 
  to 
  an 
  

   Astarte, 
  looks 
  like 
  

   one, 
  Fem, 
  ) 
  

  

  i 
  Parastarte 
  triquetra 
  Conrad 
  (Lat. 
  three- 
  

   ! 
  cornered, 
  triangular, 
  ) 
  

  

  Family 
  Petricolida 
  e. 
  ( 
  Lat 
  . 
  

   dwell. 
  Rock 
  dv/ellers.) 
  

  

  petra, 
  a 
  rock 
  -i- 
  colere, 
  to 
  inhabit, 
  to 
  

  

  a) 
  Genus 
  Cooperella 
  Car- 
  j 
  Coopere 
  l 
  la 
  atlantica 
  Rehde 
  r 
  (Atlantic; 
  

   pe 
  nter 
  1864. 
  (From 
  ! 
  collected 
  off 
  Peanut 
  Island, 
  Lake 
  Worth, 
  

   the 
  proper 
  name 
  j 
  Florida.) 
  

   Cooper. 
  Fem, 
  ) 
  l 
  

  

  ^ 
  ) 
  Genus 
  Petricola 
  La 
  - 
  

   ma 
  rck 
  1801. 
  ( 
  The 
  en- 
  

   ding 
  ''cola" 
  should 
  

   be 
  considered 
  masc.) 
  

  

  c) 
  Genus 
  Rupjlla 
  ria 
  

   Fle 
  uriau 
  1802 
  . 
  fLa 
  t 
  . 
  

   rupellu.s, 
  diminuti- 
  

   ve 
  of 
  rupes, 
  rock, 
  

   stone. 
  Fem.) 
  

  

  Petricola 
  lapicida 
  Gmelin 
  (lapicida 
  is 
  a 
  

   masculine 
  noun 
  in 
  Latin; 
  it 
  means 
  a 
  

   stone 
  cutter. 
  It 
  bores 
  in 
  coral.) 
  

   { 
  Petricola 
  pholadif 
  ormis 
  Lamarck 
  ( 
  Gr 
  . 
  

   j 
  pholas, 
  lurking 
  in 
  a 
  hole 
  -'- 
  Lat. 
  forma, 
  

   i 
  shape, 
  form; 
  looks 
  like 
  a 
  Pholas; 
  Pholas- 
  

   j 
  shaped; 
  thin, 
  elongate, 
  cylindrical.) 
  

   1 
  Petricola 
  pholadif 
  ormis 
  latus 
  Pall 
  ( 
  1 
  a 
  t 
  u 
  s 
  ^ 
  

   i 
  v/ide, 
  broad; 
  it 
  is 
  broader 
  than 
  the 
  pre- 
  

   I 
  ceding 
  one.) 
  

  

  i 
  Rupellaria 
  cancellata 
  Verrill 
  ( 
  trellis. 
  

  

  ! 
  like, 
  cross-barred, 
  y 
  

  

  I 
  Rupellaria 
  typica 
  Jonas 
  ( 
  ty 
  pi 
  c 
  al 
  , 
  ) 
  

  

  