﻿9. 
  Family 
  Potamididae 
  . 
  (Gr, 
  

  

  41 
  

   potamos, 
  

  

  river; 
  of 
  or 
  from 
  a 
  river; 
  shal- 
  

  

  low-water 
  

  

  dwellers; 
  

  

  intertidal 
  mud 
  lovers.) 
  

  

  I 
  Cerithidea 
  cost 
  at 
  a 
  Da 
  Costa 
  (ribbed; 
  

  

  sculptured 
  with 
  thick 
  vertical 
  ribs.) 
  

   Cerithidea 
  costata 
  turrita 
  Stearns 
  ( 
  tur- 
  

  

  the 
  

  

  a 
  ) 
  Genus 
  Cerithidea 
  

   ^.'/ 
  ainson 
  1840 
  . 
  (Gr 
  , 
  

   ceration, 
  a 
  little 
  

   horn; 
  resembling 
  

   a 
  Cerithium. 
  Fem.) 
  

  

  "b 
  ) 
  Genus 
  Batillaria 
  Ben 
  - 
  

   son 
  1842 
  . 
  (Perhaps 
  

   Lat. 
  batillum, 
  a 
  cas- 
  

   solette, 
  perfume-box 
  

   or 
  pan. 
  Fern,) 
  

  

  rited; 
  v/ith 
  straighter 
  ribs 
  than 
  

   preceding 
  one.) 
  

  

  Cerithidea 
  costata 
  beattyi 
  Bequaert 
  ( 
  na- 
  

   med 
  for 
  H. 
  A. 
  Beatty, 
  collector. 
  ) 
  

  

  Cerithidea 
  pliculosa 
  Llenke 
  (with 
  folds; 
  

   shell 
  with 
  vertical 
  ribs 
  and 
  fine 
  spiral 
  

   striae, 
  ) 
  

  

  Cerithidea 
  pliculosa 
  veracruzen 
  s 
  is 
  B 
  e- 
  

   quaert 
  (holotype 
  from 
  Vera 
  Cruz, 
  Mexico.) 
  

  

  Cerithid 
  e 
  a 
  scalarif 
  ormis 
  Say 
  (staircase- 
  

   shaped. 
  J 
  

  

  Batillaria 
  minima 
  Gmelin 
  (very 
  small; 
  

   largest 
  adult 
  21.4 
  mm. 
  Cerithium 
  minimu 
  m 
  

   nigrescens 
  Menk 
  e 
  (dark 
  colored) 
  and 
  Ce 
  - 
  

   rithium 
  septems 
  t 
  riatum 
  Say 
  (with 
  seven 
  

   striaej 
  are 
  the 
  same 
  as 
  B. 
  minima 
  Gmelin.) 
  

  

  Ba 
  t 
  illaria 
  minima 
  rawsoni 
  Morch 
  ( 
  nam.ed 
  

   for 
  Governor 
  Rawson, 
  of 
  the 
  Bahamas.) 
  

  

  Ba 
  tillaria 
  minima 
  degenerata 
  Pall 
  (dege- 
  

   nerated; 
  scarcely 
  sculptured 
  longitudi- 
  

   nally.) 
  

  

  a) 
  G 
  

  

  Cerithium 
  Bru- 
  

  

  ^ 
  10. 
  Family 
  Cerithiidae 
  . 
  (Gr. 
  ceration, 
  a 
  little 
  horn. 
  Shells 
  with 
  horn- 
  

   like 
  form. 
  Based 
  on 
  le 
  Cerithe, 
  name 
  used 
  by 
  Adanson 
  in 
  1757.) 
  

  

  Cerithium 
  algicola 
  C.B.Adams 
  (Lat. 
  alga, 
  

   seaweed 
  -^ 
  cola, 
  inhabitant; 
  seaweed 
  

   dweller. 
  ) 
  

  

  Cerit 
  h 
  ium 
  atratu 
  m 
  B 
  orn 
  (blackish; 
  gray 
  

   with 
  dark 
  brown 
  sliades 
  or 
  entirely 
  cho- 
  

   colate, 
  ) 
  

  

  Cerithium 
  auric 
  o 
  mumSchwengel 
  (Lat. 
  auri- 
  

   comus, 
  an 
  adjective, 
  golden 
  hair; 
  color 
  

   white, 
  but 
  with 
  pale 
  yellow 
  or 
  light 
  

   brown 
  in 
  the 
  intervals 
  of 
  the 
  spiral 
  

   striae, 
  ) 
  

  

  Cerithium 
  biminiense 
  Pils 
  br 
  y 
  & 
  McGinty 
  

   (from 
  Bimini 
  Island, 
  Bahamas. 
  Known 
  also 
  

   as 
  Thericiura 
  biminiense.) 
  

  

  Cer 
  ithi 
  um 
  ch 
  ara 
  P 
  ilsbry 
  (a 
  root, 
  stake; 
  

   shell 
  long 
  and 
  very 
  slender; 
  has 
  nume- 
  

   rous 
  whorls.) 
  Formerly 
  known 
  as 
  Theri- 
  

   cium 
  chara. 
  ) 
  

  

  Cer 
  ithium 
  e 
  burne 
  um 
  B 
  r 
  uguiere 
  (ivory; 
  co- 
  

   lor 
  from 
  white 
  to 
  brown."] 
  

  

  Cerithium 
  florid 
  an 
  um 
  M'dr 
  ch 
  (Florida.) 
  

  

  Cer 
  ithium 
  l 
  i 
  teratum 
  Born 
  flettered; 
  white 
  

   v/ith 
  black 
  spots. 
  1 
  

  

  Cerithi 
  u 
  m 
  lite 
  ratum 
  s 
  emiferrugine 
  um 
  La- 
  

   mar 
  ck 
  tpartly 
  resembling 
  iron 
  rust 
  in 
  

   color; 
  the 
  ground 
  is 
  white 
  variegated 
  

   with 
  yellowish 
  brown.) 
  

  

  Genus 
  

  

  guiere 
  1789 
  . 
  Genus 
  

   The 
  ricium 
  Mon 
  t 
  erosa 
  - 
  

   to 
  1890 
  is 
  this 
  ge- 
  

   nus. 
  {"This 
  name 
  The- 
  

   ricium 
  is 
  a 
  trans- 
  

   position 
  of 
  letters 
  

   c 
  and 
  th 
  of 
  Cerithi- 
  

   um. 
  Neuter.) 
  

  

  