﻿c 
  ) 
  Ge 
  nus 
  Trigonio 
  c 
  ardia 
  

   Pall 
  1900. 
  (Gr. 
  tri- 
  

   gonos, 
  three-corner- 
  

   ed, 
  triangular 
  — 
  

   cardia, 
  heart. 
  Fern.) 
  

  

  d 
  ) 
  Genus 
  Ii/[icrocardium 
  

   Thiele 
  1934. 
  (Gr. 
  

   micros, 
  small 
  -t- 
  

   cardia, 
  heart. 
  On 
  

   account 
  of 
  ending, 
  

   neuter, 
  ) 
  

  

  g) 
  

  

  e 
  ) 
  Genus 
  Laevicar 
  dium 
  

   Swains 
  on 
  1840. 
  "(Tat 
  . 
  

   laevis, 
  smooth 
  -h 
  

   cardia, 
  heart 
  .Neuteri) 
  

  

  166 
  I 
  

  

  i 
  Papyridea 
  semi 
  sulcata 
  Sowerby 
  (half- 
  ■, 
  

   furrowed; 
  toward 
  the 
  middle 
  of 
  the 
  shell! 
  

   I 
  the 
  rihs 
  "become 
  wider, 
  flatter 
  and 
  much 
  1 
  

   I 
  smoother 
  than 
  on 
  the 
  anterior 
  and 
  poste- 
  

   l 
  rior 
  slopes.) 
  

  

  Trigoniocardia 
  ant 
  il 
  larum 
  O 
  rhigny 
  ( 
  of 
  the 
  

   Antilles! 
  range: 
  Florida 
  Strait 
  to 
  the 
  i 
  

   '7est 
  Indies.) 
  i 
  

  

  Trigoniocardia 
  ceramida 
  Pall 
  ( 
  Gr 
  , 
  c 
  er 
  ami 
  s] 
  

   ceramid-, 
  a 
  roof-tile, 
  a 
  tiled 
  roof.) 
  ; 
  

  

  Trig 
  o 
  niocardia 
  media 
  Linne 
  (middle, 
  cen- 
  j 
  

   tral; 
  anterior 
  lateral 
  and 
  posterior 
  

   lateral 
  teeth 
  about 
  equal 
  distance 
  from 
  

  

  . 
  the 
  cardinal 
  teeth.) 
  

  

  Microcar 
  d 
  ium 
  peramabile 
  Pall 
  (very 
  lovely,) 
  

   Microcardium 
  tinctum 
  Pall 
  (dyed, 
  colored; 
  

  

  color 
  whitish 
  tinted 
  with 
  pink 
  or 
  red.) 
  

   Microcardium 
  transversum 
  Reh 
  d 
  er 
  & 
  Abbott 
  

  

  (transverse; 
  shell 
  transversely 
  ovate. 
  ) 
  

  

  Laevicardium 
  laevigati^un 
  Linne 
  ( 
  Lat 
  . 
  laevi 
  - 
  

   gatum 
  means 
  "made 
  smooth"; 
  valves 
  are 
  

   polished, 
  smooth; 
  surnamed 
  Egg 
  Shell 
  

   Cockle, 
  ) 
  

  

  Laevicardium 
  mortoni 
  Conrad 
  ( 
  Morton 
  ' 
  s 
  ; 
  

   named 
  for 
  Samuel 
  G. 
  Morton, 
  an 
  American 
  

   naturalist, 
  1799-1851.) 
  

  

  Laevicardium 
  pictum 
  Ravenel 
  ( 
  pai 
  nte 
  d 
  ; 
  co- 
  

   lor: 
  white 
  or 
  cream 
  with 
  shades 
  of 
  rose 
  

   or 
  brown. 
  ) 
  

  

  Laevi 
  cardii;un 
  sybaritici;un 
  Pall 
  ( 
  sy 
  ba 
  r 
  i 
  t 
  an 
  ; 
  

   shell 
  thin, 
  small, 
  delicate, 
  more 
  infla- 
  

  

  . 
  ted 
  than 
  L. 
  pictum.) 
  

  

  f 
  ) 
  Genus 
  Pinocardium 
  

  

  Pall 
  1900. 
  (Gr.deinos, 
  

   huge, 
  mighty 
  -♦- 
  

   cardia, 
  heart.rleuter.) 
  

  

  Genus 
  Serripes 
  Gould 
  

   1841. 
  (Lat. 
  serra, 
  a 
  

   saw^ 
  -«- 
  pes, 
  a 
  foot; 
  

   so 
  called 
  "on 
  account 
  

   of 
  the 
  s 
  errated 
  mar- 
  

   gin 
  of 
  the 
  animal's 
  

   foot. 
  "(Gould 
  & 
  Binnqy) 
  

   Masc.) 
  

  

  h) 
  Genus 
  Clinocardium 
  

  

  Pinocardiiim 
  robustum 
  Solander 
  (robust, 
  

   strong; 
  height 
  up 
  to 
  104 
  mm.; 
  length, 
  

   106 
  mm, 
  ) 
  

  

  Pinocardium 
  robustxom 
  vanhyningi 
  Clenoh 
  & 
  

   L 
  . 
  C 
  . 
  Smi 
  th 
  Tnajaed 
  for 
  T. 
  Van 
  Hyning, 
  Pi- 
  

   rector 
  of 
  the 
  Florida 
  State 
  Museum, 
  

   Gainesville, 
  Florida.) 
  

  

  Serripes 
  groenlandicus 
  Bruguiere 
  (from 
  

   Greenland; 
  range: 
  Greenland 
  to 
  Cape 
  Cod, 
  

   Massachusetts, 
  ) 
  

  

  Keen 
  1956. 
  ( 
  Gr.clineinj 
  Clinocardium 
  ciliatum 
  Fabricius 
  (Lat. 
  

  

  to 
  incline 
  -i- 
  cardia, 
  

   heart, 
  Shell 
  obliquely' 
  

   ovate, 
  Heuter.) 
  

  

  liaving 
  eyebrows, 
  eyelashes; 
  the 
  perios- 
  

   tracura 
  is 
  fringed, 
  fringe-like.) 
  

  

  