﻿SlIITH 
  : 
  SHELLS 
  OF 
  SOUXn 
  AFRICAN 
  SEPIID^. 
  21 
  

  

  Sepia 
  zaxzibaeica, 
  Pfeifer. 
  

  

  Sepia 
  zanzilarica, 
  PfefFer, 
  Abliandl. 
  Naturwiss. 
  Verein 
  Hamburg, 
  

   vol. 
  viii, 
  Heftii, 
  ^o. 
  6, 
  1884, 
  p. 
  9, 
  tigs. 
  11, 
  Ua. 
  

  

  Eah.- 
  Tongaat, 
  Natal 
  (H. 
  C. 
  Burnup) 
  ; 
  Zanzibar 
  (G. 
  PfefPer). 
  

  

  A 
  single 
  shell 
  from 
  Tongaat 
  agrees 
  in 
  every 
  respect 
  "witli 
  tbe 
  

   description 
  and 
  figure, 
  but 
  is 
  mucli 
  larger, 
  liaving 
  a 
  length 
  of 
  255 
  mm. 
  

   The 
  dorsal 
  surface, 
  not 
  referred 
  to 
  by 
  Dr. 
  Pfelfer, 
  is 
  coarsely 
  wrinkled 
  

   towards 
  the 
  posterior 
  end, 
  tlie 
  wrinkling 
  becoming 
  gradually 
  more 
  

   feeble 
  anteriorly. 
  

  

  This 
  species 
  is 
  remarkable 
  for 
  the 
  very 
  broad, 
  deep 
  central 
  

   depression 
  on 
  the 
  ventral 
  side, 
  and 
  for 
  the 
  great 
  development 
  of 
  

   the 
  deep 
  inner 
  cone, 
  which 
  is 
  lined 
  with 
  a 
  thick 
  calcareous 
  deposit 
  

   and 
  has 
  a 
  chitinous 
  outer 
  covering. 
  The 
  yellowish 
  chitinous 
  margin 
  

   of 
  the 
  shell 
  is 
  well 
  developed 
  all 
  round, 
  and 
  united 
  above, 
  but 
  free 
  

   from 
  the 
  end 
  of 
  the 
  inner 
  cone. 
  The 
  spine 
  is 
  short 
  and 
  strong, 
  and 
  

   arises 
  from 
  a 
  much 
  thickened 
  shelly 
  margin. 
  Colour 
  white, 
  excepting 
  

   an 
  obscure 
  reddish 
  ray 
  on 
  each 
  side, 
  diverging 
  from 
  the 
  posterior 
  end. 
  

  

  Sepia 
  acttminata, 
  n.sp. 
  PI. 
  II, 
  Figs. 
  3, 
  4. 
  

  

  Shell 
  elongate 
  elliptical, 
  conspicuously 
  tapering 
  and 
  becoming 
  

   pointed 
  anteriorly; 
  striated 
  area 
  flattish 
  or 
  a 
  little 
  concave, 
  occupying 
  

   more 
  than 
  half 
  the 
  total 
  length, 
  with 
  a 
  shallow 
  central 
  groove 
  and 
  

   a 
  few 
  faint 
  strife 
  radiating 
  from 
  the 
  hinder 
  end, 
  causing 
  the 
  curved 
  

   transverse 
  striae 
  to 
  be 
  a 
  little 
  wavy. 
  Chitinous 
  margin 
  broad 
  

   posteriorly, 
  thinly 
  lined 
  with 
  callus, 
  which 
  is 
  a 
  little 
  thickened 
  

   beneath 
  the 
  spine, 
  the 
  thickening 
  being 
  ridged 
  or 
  striated. 
  Limbs 
  of 
  

   the 
  inner 
  cone 
  thickened, 
  united 
  behind, 
  forming 
  a 
  rounded 
  angle, 
  

   horn-colour. 
  Spine 
  moderate, 
  rounded, 
  not 
  keeled, 
  generally 
  directed 
  

   slightly 
  dorsally, 
  Dorsal 
  surface 
  reddish, 
  excepting 
  the 
  corneous 
  

   margin, 
  having 
  a 
  faint 
  central 
  ridge, 
  finely 
  wrinkled 
  and 
  granulated. 
  

  

  Length 
  103, 
  greatest 
  width 
  36, 
  greatest 
  thickness 
  9 
  mm. 
  

  

  Sah. 
  — 
  Port 
  Elizabeth 
  (J. 
  H. 
  Ponsonby 
  and 
  H. 
  A. 
  Spencer) 
  ; 
  Tongaat 
  

   Beach, 
  Natal 
  (H. 
  C. 
  Burnup). 
  

  

  A 
  small 
  specimen, 
  35 
  ram. 
  in 
  length, 
  described 
  by 
  Dr. 
  G. 
  Pfeffer 
  as 
  

   S. 
  ve7iusta^ 
  {= 
  venustoides, 
  Hoyle) 
  from 
  Zanzibar 
  apparently 
  closely 
  

   resembles 
  the 
  young 
  of 
  this 
  species. 
  

  

  A 
  specimen 
  from 
  Tonguat, 
  46 
  mm. 
  in 
  length 
  (pi, 
  ii, 
  fig. 
  4), 
  differs 
  

   from 
  other 
  examples 
  of 
  the 
  same 
  size 
  in 
  having 
  the 
  chitinous 
  margin 
  

   more 
  Avidely 
  developed 
  posteriorly, 
  and 
  the 
  striated 
  area 
  is 
  longer 
  and 
  

   divided 
  into 
  three 
  distinct 
  areas, 
  one 
  on 
  each 
  side, 
  and 
  a 
  central 
  one, 
  

   twice 
  as 
  broad 
  as 
  the 
  laterals. 
  The 
  latter 
  are 
  concave 
  and 
  separated 
  

   from 
  the 
  central 
  area 
  by 
  a 
  keel 
  or 
  ridge. 
  The 
  striae 
  on 
  both 
  lateral 
  

   and 
  central 
  areas 
  are 
  elegantly 
  curved. 
  

  

  Abhandl. 
  Naturwiss. 
  Verein 
  Hamburg, 
  vol. 
  viii. 
  Heft 
  ii. 
  No. 
  6, 
  1884, 
  p. 
  12, 
  

   figs. 
  15, 
  15a. 
  

  

  