﻿Jeffreys 
  1867. 
  ( 
  Pern 
  . 
  ) 
  

  

  37 
  

   meaning 
  atom.) 
  

  

  1^ 
  I 
  

  

  7, 
  Family 
  Rissoellida 
  e, 
  (Founded 
  on 
  Rissoa, 
  which 
  was 
  named 
  in 
  honor 
  

   of 
  Risso, 
  a 
  naturalist, 
  born 
  in 
  I'ice, 
  France, 
  1777-1845.) 
  

  

  Genus 
  Ri 
  ssoella 
  Gray 
  Rissoell 
  a 
  cariTpa 
  ea 
  Rehder 
  (Caribbean; 
  

   1847. 
  (FemT) 
  ."found 
  a"t 
  Bonefish 
  Key, 
  Florida.) 
  

  

  8. 
  

  

  Family 
  Chor 
  i 
  stida 
  e. 
  (Gr. 
  choristes, 
  one 
  who 
  separates 
  or 
  sets 
  a- 
  . 
  

   part", 
  or 
  choristos, 
  separated. 
  Verrill 
  writes: 
  "The 
  peculiar 
  struol 
  

   ture 
  of 
  the 
  animal 
  and 
  of 
  its 
  radula 
  will 
  not 
  allow 
  it 
  to 
  be 
  pla- 
  j 
  

   ced 
  in 
  any 
  family." 
  It 
  has 
  to 
  be 
  separated.) 
  { 
  

  

  ^ 
  ) 
  Genus 
  Chorist 
  es 
  Car- 
  ; 
  Choris 
  tes 
  el 
  ep:an3 
  tener 
  Verrill 
  ( 
  e 
  le 
  gaji 
  t 
  ; 
  | 
  

   penter 
  187 
  2TrMasc.T 
  '_ 
  delicate; 
  shell 
  is 
  thin, 
  fragile.) 
  ; 
  

  

  b 
  ) 
  Genus 
  C 
  horistella 
  

   Bu 
  sh 
  18 
  9 
  7. 
  (Diminu- 
  

   tive 
  of 
  Choristes, 
  

   separated. 
  Fern.) 
  

  

  ; 
  Choristella 
  brychia 
  Sush 
  (Gr. 
  from 
  the 
  

   ' 
  depths 
  of 
  the 
  sea; 
  810 
  fathoms.) 
  

   j 
  Chorist 
  ella 
  le 
  pt 
  alea 
  Bush 
  (Gr. 
  fine, 
  de- 
  

   ;. 
  lie 
  ate, 
  thin.y~ 
  

  

  III. 
  SUPERFAIII 
  LY 
  CE 
  R 
  ITHIACEA 
  

  

  (Gr, 
  ceration, 
  a 
  little 
  horn. 
  Shells 
  with 
  horn-like 
  form. 
  Based 
  on 
  le 
  

   Cerithe, 
  name 
  used 
  by 
  Adanson 
  in 
  1757.) 
  

  

  1. 
  Family 
  Turritellidae 
  . 
  ( 
  

   turreted. 
  Common 
  name: 
  

  

  Lat, 
  turris, 
  a 
  tower; 
  

   Turret 
  Shells,) 
  

  

  turritus, 
  towered. 
  

  

  a 
  ) 
  Genus 
  Turritella 
  L 
  a- 
  

   marck 
  1799. 
  (Little 
  

   tower. 
  Fern,) 
  

  

  ^ 
  ) 
  Ge 
  nus 
  Turritell 
  o 
  psi 
  s 
  

   GcO. 
  Sars 
  1878 
  . 
  {Tat 
  . 
  

   turritella, 
  little 
  

   tower 
  -f- 
  opsis, 
  ap- 
  

   pearance. 
  Resembling 
  

   a 
  Turritella. 
  Fern.) 
  

  

  c 
  ) 
  Genus 
  JTachyrhy 
  nchus 
  

   Moroh 
  1868 
  . 
  Tc-r 
  . 
  

   Lacliys, 
  quick, 
  fast 
  

   rhynchus, 
  a 
  snout, 
  

   beak, 
  Neuter.) 
  

  

  Turri 
  tella 
  subannula 
  ta 
  acrop 
  ora 
  Pall 
  ( 
  subj- 
  

   armulata, 
  somewhat 
  ringed; 
  acropora, 
  

   piercing, 
  boring 
  with 
  the 
  point, 
  also 
  

   pierced 
  at 
  the 
  end, 
  with 
  an 
  opening 
  at 
  

   the 
  end. 
  Shell 
  covered 
  with 
  fine 
  spiral 
  

   grooving; 
  base 
  slightly 
  excavated.) 
  

  

  Turrit 
  ella 
  variegata 
  Linne 
  ( 
  vari 
  egated 
  ; 
  

   color 
  pale 
  brownish 
  variegated 
  with 
  cho- 
  

   colate 
  or 
  purplish 
  brown. 
  ) 
  

  

  Turr 
  ite 
  lla 
  exo 
  leta 
  Li 
  nne 
  (Lat. 
  not 
  grow- 
  

   ing 
  any 
  more, 
  getting 
  old.) 
  

  

  Turritella 
  yucatecana_Dall 
  (from 
  Yucatan 
  

   . 
  StraitTT" 
  

  

  Turrit 
  ello 
  psis 
  acicu 
  la 
  Stimpson 
  (Lat. 
  a 
  

   small 
  pin 
  for 
  a 
  head-dress; 
  shell 
  small, 
  

   bound 
  vrith 
  transverse 
  ribs, 
  of 
  v/hich 
  

   three 
  are 
  stoutest.) 
  

  

  T 
  urritellopsis 
  f 
  l 
  oridana 
  Pall 
  (Florida.) 
  

  

  Ta 
  chyrhynchus 
  erosum_CouthouA/; 
  (eroded; 
  

   the 
  apex 
  is 
  often 
  erodedTT 
  

  

  Tachyr 
  hynchus 
  reti 
  cu 
  latum 
  Mighels 
  & 
  A 
  - 
  

   dams 
  Tnetted, 
  with 
  a 
  network; 
  shell 
  

   with 
  longitudinal 
  folds 
  and 
  transverse 
  

   striae. 
  The 
  whole 
  surface 
  of 
  the 
  shell 
  

   has 
  a 
  reticulated 
  appearance.) 
  

  

  2, 
  Family 
  M 
  at 
  hildi 
  dae. 
  (From 
  the 
  proper 
  name 
  Mathilda. 
  0. 
  Semper 
  does 
  

  

  