﻿12 
  

   CLASS_ 
  GASTROPODA 
  

  

  (Greek 
  gaster, 
  gastr-, 
  stomach 
  •♦- 
  pous, 
  pod-, 
  foot; 
  belly-footed. 
  The 
  

   foot 
  is 
  attached 
  to 
  the 
  ventral 
  surface.) 
  

  

  SUBCLASS 
  PROSOB 
  RANGHIA 
  

  

  (Gr. 
  proso, 
  forward 
  -+- 
  hranchia, 
  gills. 
  The 
  gills 
  are 
  in 
  front 
  of 
  the 
  

   heart.) 
  

  

  A. 
  ORDER 
  ARCHASO 
  GA 
  STROPODA 
  

  

  (Gr. 
  archaios, 
  ancient, 
  primeval 
  4- 
  gastropoda, 
  gastropods.) 
  

  

  I. 
  SUPER? 
  AlIILY 
  PI:EUR0T0MAR.IAC3A 
  

  

  (Gr. 
  pleura, 
  side 
  -»- 
  tomarion, 
  a 
  slice, 
  cut, 
  slit. 
  These 
  shells 
  have 
  

   8. 
  wide 
  slit 
  at 
  the 
  periphery 
  of 
  the 
  body 
  whorl. 
  -Acea. 
  is 
  the 
  termina- 
  

   tion 
  generally 
  used 
  to 
  designate 
  -superfamilies. 
  ) 
  

  

  1. 
  Famil 
  y 
  Scissurellidae 
  . 
  

   lip 
  is 
  slit. 
  ) 
  

  

  Genu 
  s 
  Scissurella 
  Or- 
  

   bigny 
  1825 
  . 
  (Fem.1 
  

  

  (Lat, 
  scissura, 
  a 
  rending, 
  a 
  slit. 
  The 
  outer 
  

  

  Scissurella 
  alta 
  Watson 
  (high; 
  shell- 
  is 
  

   high, 
  has 
  a 
  somewhat 
  prominent 
  tip.) 
  

  

  Soiseurella 
  crispata 
  Fleming 
  (curled, 
  

   wrinl:led. 
  ) 
  

  

  Scissurella 
  proxima 
  Pall 
  (near, 
  cLose-tos.. 
  

   "this 
  species 
  is 
  smaller 
  and 
  relatively 
  

   more 
  elevated 
  than 
  S. 
  crispata; 
  less 
  e- 
  

   levated 
  and 
  with 
  much 
  Less 
  prominent 
  

   sculpture 
  than 
  S. 
  alta, 
  especially 
  on 
  

   the 
  base." 
  (Dall) 
  

  

  2. 
  Family 
  Pleurotomariidae 
  .. 
  (Gr« 
  pleura, 
  side 
  -»- 
  tomarion, 
  slit, 
  cut.) 
  

  

  Genus 
  Perotrochu^ 
  P. 
  

  

  i 
  Perotrochus 
  quoyanus 
  Fischer 
  & 
  Bernard 
  i 
  

  

  (named 
  for 
  Quoy, 
  a 
  French 
  naturalist 
  wh'-> 
  

  

  Fischer 
  188 
  6. 
  (Gr.peTO-s^. 
  died 
  in 
  1870.) 
  

   maimed 
  h- 
  trochus, 
  any- 
  Perotrochus 
  adansonianus 
  Crosse 
  & 
  Fis 
  cher 
  

   thing 
  rtjund.. 
  Shell 
  slitj 
  (named 
  for 
  Michel 
  Adanson, 
  a 
  French 
  bo 
  > 
  

   (Masc.) 
  L 
  anist, 
  1727-1806.) 
  

  

  3, 
  Family 
  Haliotidae 
  . 
  (Gr. 
  hals, 
  hal-, 
  the 
  sea 
  -r 
  oua, 
  ot-, 
  -ear;- 
  mar- 
  

  

  ine 
  ear. 
  Ear-shaped 
  shells. 
  Common 
  name: 
  Abalone.) 
  

  

  Genus 
  Haliotis 
  Linne 
  i 
  Haliotis 
  pourtalesi 
  Dall 
  (named 
  for 
  .Count' 
  

   1758 
  . 
  (Although 
  "ous" 
  i-B-! 
  Louis 
  Francois 
  de 
  Pourtales 
  who 
  around 
  

   neuter 
  in 
  Gr., 
  haliotis 
  I 
  1869 
  explored 
  the 
  Florida 
  Straits,.. 
  1823- 
  

   is 
  used 
  in 
  the 
  • 
  feminine 
  ! 
  1880.) 
  

   by 
  conchologists 
  . 
  ) 
  L 
  

  

  4. 
  Family 
  Fissurellidae 
  . 
  (.Dlminutive.of.Lat. 
  fissura,- 
  a 
  fisaure, 
  notch, 
  

  

  chink. 
  These 
  shells 
  have 
  a 
  perforation, 
  a 
  notch. 
  Common 
  name: 
  

   U-ttle 
  Chinks.) 
  

  

  J 
  Emarginula 
  crassa 
  Sowerby 
  (thick; 
  - 
  she'll 
  

   innoderately 
  heavy.) 
  

  

  