﻿A 
  Synopsis 
  of 
  the 
  Order 
  Hyperoartii. 
  193 
  

  

  streaked 
  with 
  white 
  ; 
  coxse 
  yellow. 
  Fore 
  wings 
  black 
  ; 
  the 
  

   basal 
  half 
  of 
  cell 
  and 
  a 
  broad 
  fascia 
  above 
  inner 
  margin 
  

   from 
  base 
  to 
  beyond 
  vein 
  2 
  reddish 
  brown 
  ; 
  a 
  spot 
  at 
  end 
  of 
  

   ctdl 
  and 
  streak 
  on 
  costa 
  above 
  it 
  yellow, 
  irrorated 
  with 
  pale 
  

   olive-brown 
  ; 
  a 
  postmedial 
  quadrate, 
  downwardly 
  oblique, 
  

   brownish 
  patch 
  crossed 
  by 
  vein 
  3 
  ; 
  a 
  subterminal 
  oblique 
  

   row 
  of 
  spots 
  from 
  costa 
  to 
  vein 
  4, 
  yellowish, 
  thickly 
  irrorated 
  

   with 
  pale 
  olive-brown 
  ; 
  a 
  marginal 
  row 
  of 
  yellowish-white 
  

   spots, 
  smaller 
  and 
  quadrate 
  between 
  veins 
  3-6, 
  otherwise 
  

   elongated, 
  the 
  subcostal 
  spots 
  irrorated 
  with 
  brown. 
  Hind 
  

   wings 
  rufous 
  ; 
  a 
  broad 
  black 
  fascia 
  along 
  subcostal 
  : 
  the 
  

   outer 
  margin 
  black, 
  deeply 
  dentate 
  inwardly 
  on 
  veins, 
  the 
  

   interspaces 
  with 
  yellowish 
  spots 
  at 
  their 
  base; 
  a 
  postmedial 
  

   black 
  fascia 
  from 
  veins 
  2-4. 
  Underneath 
  the 
  spots 
  on 
  fore 
  

   wings 
  are 
  chiefly 
  clear 
  yellow. 
  

  

  Expanse 
  96 
  mm. 
  

  

  Hab. 
  Carillo. 
  

  

  Allied 
  to 
  O. 
  zagrcea, 
  Feld., 
  but 
  the 
  basal 
  brown 
  markings 
  

   are 
  entirely 
  different. 
  

  

  XVIII. 
  — 
  A 
  Synopsis 
  of 
  the 
  Marsipobranchs 
  of 
  the 
  Order 
  

   Hyperoartii. 
  By 
  C. 
  TATE 
  Regan, 
  M.A. 
  

  

  (Published 
  by 
  permission 
  of 
  the 
  Trustees 
  of 
  the 
  British 
  Museum.) 
  

  

  The 
  Hyperoartii 
  (Lampreys) 
  are 
  Marsipobranchs 
  with 
  the 
  

   nasal 
  aperture 
  on 
  the 
  upper 
  surface 
  of 
  the 
  head 
  and 
  the 
  

   naso-palatine 
  canal 
  ending 
  blindly 
  posteriorly. 
  Eyes 
  well- 
  

   developed 
  (in 
  the 
  adult). 
  Two 
  semicircular 
  canals. 
  Mouth 
  

   with 
  expanded 
  toothed 
  lips 
  ; 
  tongue 
  with 
  a 
  single 
  anterior 
  

   and 
  a 
  pair 
  of 
  posterior 
  cuspidate 
  lamina? 
  (compound 
  teeth). 
  

   Branchial 
  sacs 
  seven 
  on 
  each 
  side, 
  not 
  far 
  behind 
  the 
  head, 
  

   communicating 
  internally 
  with 
  a 
  subcesophageal 
  canal 
  which 
  

   opens 
  anteriorly 
  into 
  the 
  pharynx 
  ; 
  an 
  extra-branchial 
  skele- 
  

   ton 
  forming 
  a 
  basket-work. 
  Eggs 
  small, 
  numerous 
  ; 
  seg- 
  

   mentation 
  holublastic 
  ; 
  a 
  metamorphosis. 
  A 
  caudal 
  and 
  two 
  

   dorsal 
  fins, 
  sometimes 
  united. 
  

  

  The 
  larvae 
  (Ammoccetes) 
  appear 
  to 
  be 
  extremely 
  similar 
  in 
  

   all 
  the 
  northern 
  genera. 
  They 
  are 
  toothless, 
  with 
  a 
  small 
  

   transverse 
  lower 
  lip 
  and 
  a 
  hood-like 
  upper 
  lip 
  ; 
  a 
  circle 
  of 
  

   fringed 
  barbels 
  surrounds 
  the 
  mouth. 
  The 
  eyes 
  are 
  rudi- 
  

   mentary 
  and 
  subcutaneous, 
  the 
  small 
  gill-openings 
  lie 
  in 
  a 
  

  

  Ann. 
  & 
  Mag. 
  N. 
  Hist. 
  Ser. 
  8. 
  Vol 
  vii. 
  13 
  

  

  