﻿CLASS 
  

  

  188 
  

  

  CEPHALOPODA 
  

  

  (Gr, 
  cephale, 
  head 
  ->- 
  pous, 
  pod-, 
  foot. 
  These 
  mollusks 
  have 
  a 
  group 
  

   of 
  elongated 
  arras 
  or 
  feet 
  around 
  the 
  head.) 
  

  

  SUBCLASS 
  DIBRANCHIA 
  

  

  (Gr. 
  di, 
  for 
  dis, 
  twice 
  — 
  branchia, 
  gills; 
  having 
  two 
  gill-plumes. 
  

   The 
  subclass 
  Tetrahranchia 
  (to 
  v/hich 
  the 
  famous 
  Nautilus 
  pompilius 
  

   Linne 
  "belongs 
  | 
  Gr. 
  tetra, 
  four 
  — 
  branchia, 
  gills; 
  having 
  four 
  gills) 
  

   has 
  no 
  representatives 
  in 
  the 
  American 
  ^.Yestern 
  Atlantic.) 
  

  

  A. 
  ORDER 
  DBCAPO 
  DA 
  

  

  (Gr, 
  deca, 
  ten 
  — 
  pous, 
  pod-, 
  foot. 
  Sometimes 
  called 
  O 
  rder 
  Decacera 
  t 
  

   deca, 
  ten 
  — 
  cera, 
  horn. 
  These 
  mollusks 
  have 
  ten 
  feet, 
  or 
  arms, 
  or 
  

   horns, 
  ) 
  

  

  I. 
  SUPERFMULY 
  SEPIACEA 
  

  

  (Gr. 
  and 
  Lat. 
  sepia, 
  the 
  cuttlefish 
  or 
  squid 
  — 
  acea, 
  the 
  ending 
  ge- 
  

   nerally 
  used 
  to 
  designate 
  superfamilies, 
  ) 
  

  

  1, 
  Family 
  Spirulidae 
  . 
  (Lat, 
  spirula, 
  diminutive 
  of 
  spira, 
  little 
  spi- 
  

   ral. 
  Common 
  name: 
  Spiral 
  Shells.) 
  

  

  Genus 
  Spiru 
  la 
  _La 
  - 
  

   marck 
  1799 
  7TFem. 
  ) 
  

  

  Spirula 
  spirula 
  Linne 
  . 
  

  

  2. 
  Family 
  Sepiolidae 
  . 
  (Lat, 
  sepiola, 
  a 
  little 
  cuttlefish,) 
  

  

  I 
  

  

  1 
  Rossia 
  hyatti 
  Verrill 
  (Hyatt's; 
  named 
  foij 
  

   ! 
  Alpheus 
  Hyatt, 
  ) 
  I 
  

  

  ' 
  Rossia 
  megaptera 
  Verrill 
  (with 
  large 
  ( 
  

   j 
  wings; 
  the 
  fins 
  are 
  very 
  large 
  and 
  broad) 
  

   ! 
  Rossia 
  s 
  ublaevis 
  Verrill 
  ( 
  somewhat 
  | 
  

   ! 
  smooth; 
  upper 
  surface 
  of 
  the 
  body 
  and 
  j 
  

   i 
  head 
  nearly 
  smooth. 
  ) 
  

  

  a) 
  Genus 
  Rossia 
  Owen 
  

   1828, 
  (Named 
  after 
  

   Sir 
  John 
  Ross, 
  a 
  

   British 
  rear-admi- 
  

   ral 
  and 
  Arctic 
  ex- 
  

   plorer, 
  1777-1856. 
  

   Fem.) 
  

  

  b 
  ) 
  G 
  enus 
  Semirossia 
  

   S 
  teenstrup 
  1887 
  . 
  

   Csemi, 
  half, 
  part- 
  

   ly 
  --- 
  rossia, 
  from 
  

   Sir 
  John 
  Ross,Fem^ 
  

  

  c 
  ) 
  Genus 
  Stoloteuthis 
  

   Ve 
  rrill 
  188 
  1. 
  (Gr 
  . 
  

   stolis, 
  stole, 
  a 
  

   garment 
  — 
  teuthi 
  s, 
  

   a 
  cuttlefish, 
  squid. 
  

   Fem. 
  ) 
  

  

  Semirossia 
  tenera 
  Verril 
  l 
  (tender, 
  deli- 
  

   cate; 
  3 
  to 
  4 
  inches 
  in 
  length, 
  including 
  

   tentacles.) 
  

  

  Semirossia 
  equalis 
  Vo 
  ss 
  (equal; 
  suckers 
  j 
  

   about 
  equal 
  in 
  size.] 
  | 
  

  

  [ 
  

  

  S 
  toloteuthis 
  leucoptera 
  Verrill 
  ( 
  wi 
  th 
  

  

  white 
  wingsTl 
  

  

  II. 
  SUPERFAMILY 
  LOLIGINACBA 
  

   (Lat».- 
  Ibligo, 
  loligin-, 
  sepia, 
  cuttlefish.) 
  

  

  Family 
  Loliginidae. 
  (Same 
  etymology 
  as 
  above,) 
  

  

  