﻿c 
  ) 
  Genus 
  Rissoa 
  Desma 
  - 
  

   rets 
  1814 
  , 
  (Named 
  

   for 
  Risso, 
  a 
  French 
  

   naturalist, 
  1777- 
  

   1845. 
  Fem. 
  ) 
  

  

  d) 
  Genus 
  

  

  Rissoina 
  Orbi 
  - 
  

   pny 
  1840^ 
  (From 
  

  

  dedicated 
  to 
  

   French 
  na- 
  

  

  Rissoa; 
  

  

  Risso, 
  a 
  

  

  turalist, 
  1777-1845, 
  

  

  Fern.) 
  

  

  e 
  ) 
  Genus 
  Micro 
  doc 
  hus 
  

   Re 
  hder 
  194 
  5 
  7TGr 
  . 
  

   minute 
  -- 
  

   container. 
  

  

  micros, 
  

   dochos, 
  

   Masc. 
  ) 
  

  

  head; 
  chest- 
  

  

  32 
  

   Rissoa 
  pompholyx 
  Pall 
  (a 
  "bubble; 
  shell 
  

  

  thin, 
  fragile; 
  large 
  whorl 
  inflated.) 
  

   Ri 
  ssoa 
  pyrrhias 
  Watson 
  ( 
  red 
  

  

  nut 
  color, 
  ) 
  

   Rissoa 
  syngenes 
  Verrill 
  (horn 
  with, 
  akin: 
  

  

  resembling 
  another.! 
  

   Rissoa 
  xanthias 
  Watson 
  ( 
  Gr 
  . 
  xantho 
  s 
  , 
  go 
  Id-j 
  

  

  en 
  yellow; 
  nucleus 
  is 
  yellow.) 
  j 
  

   Rissoa 
  curta 
  Pall 
  (short; 
  shell 
  minute, 
  '■ 
  

  

  height 
  1,2 
  mm; 
  diameter 
  1 
  mm.) 
  

   Rissoa 
  fernandinae 
  Pall 
  (off 
  Fernandina, 
  

  

  Florida. 
  ) 
  

   Rissoa 
  st 
  e 
  wardsoni 
  Vanatta 
  (named 
  for 
  

  

  Stewardson 
  Brown 
  of 
  Bermuda, 
  collector. 
  

  

  Rissoina 
  bry 
  e 
  rea 
  Montagu 
  ( 
  Bry 
  ex 
  ' 
  s 
  . 
  ) 
  

  

  Rissoina 
  cancellata 
  Philippi 
  (trellis- 
  

   like; 
  decorated 
  v/ith 
  longitudinal 
  and 
  

   revolving 
  lines; 
  strongly 
  cancellate.) 
  

  

  Rissoina 
  che 
  s 
  neli 
  Michaud 
  ( 
  Che 
  snel 
  ' 
  s 
  . 
  ) 
  

  

  Rissoina 
  de 
  cussat 
  a 
  Montagu 
  (decussated; 
  

   striae 
  crossing 
  each 
  other 
  at 
  acute 
  an- 
  

   gles.) 
  

  

  Rissoina 
  lae 
  -'-jg 
  ata 
  C.B.Adams 
  (smooth; 
  

   shell 
  smooth, 
  shining, 
  ) 
  

  

  Rissoina 
  mayori 
  Pall 
  (named 
  in 
  honor 
  of 
  

   Pr, 
  A. 
  G. 
  Mayor, 
  of 
  the 
  Tortugas 
  Biolo- 
  

   gical 
  Station.) 
  

  

  Rissoin 
  a 
  multicostat 
  a 
  C.B.Adam 
  s 
  (with 
  

   many 
  ribs; 
  with 
  about 
  twenty-eight 
  ribs 
  

   on 
  each 
  vrtiorl, 
  ) 
  

  

  Rissoina 
  s 
  a 
  grai 
  an 
  a 
  O 
  r 
  bigny 
  ( 
  named 
  after 
  

   Ramon 
  de 
  la 
  Sagra, 
  Pirector 
  of 
  the 
  Bo- 
  

   tanical 
  Garden 
  at 
  Havana, 
  Cuba, 
  ) 
  

  

  Rissoina 
  striosa 
  C, 
  B.Adams 
  (with 
  striae. 
  

  

  Microdochus 
  floridanus 
  Rehder 
  (Florida.) 
  

  

  3, 
  

  

  Family 
  Syncerida 
  e. 
  (This 
  family 
  is 
  called 
  Synceridae 
  by 
  some 
  wri- 
  

   ters, 
  S 
  ynceratida 
  e 
  by 
  others. 
  Syncera 
  may 
  be 
  Latin 
  syncerus 
  or 
  

   sincerus: 
  sincere, 
  pure, 
  neat. 
  Is 
  it 
  derived 
  from 
  Gr. 
  syn, 
  with-^- 
  

   ceras, 
  cerat-, 
  a 
  horn 
  or 
  Lat. 
  cera, 
  v/ax?? 
  wax 
  or 
  horn-colored?? 
  

   Probably 
  one 
  of 
  those 
  words 
  chosen 
  by 
  Gray 
  for 
  their 
  euphonic 
  com+ 
  

   binations 
  of 
  syllables.) 
  

  

  Genus 
  Syncera 
  Gr 
  ay 
  

   1821. 
  Ias 
  the 
  de- 
  

   rivation 
  is 
  unknown, 
  

   Syncera 
  must 
  be 
  con- 
  

   sidered 
  feminine 
  on 
  

   account 
  of 
  its 
  end- 
  

   ing.) 
  

  

  Syncera 
  a 
  ffinis 
  Orbigny 
  (closely 
  allied 
  

  

  tO} 
  related 
  to 
  another.) 
  

   Sync 
  e 
  ra 
  a 
  ub 
  eriana 
  Or 
  bigny 
  (named 
  for 
  Mr, 
  

  

  Auber, 
  collector. 
  J 
  

   Syncera 
  modesta 
  H.C.Lea 
  (modest.) 
  

  

  4. 
  Family 
  Vi 
  trine 
  llidae 
  . 
  (Piminutive 
  of 
  vitrum, 
  glass; 
  translucent, 
  

   transparent 
  shells.) 
  

  

  