﻿1863.] 
  JENKINS 
  JAVAN 
  FOSSILS. 
  57 
  

  

  11. 
  Natica 
  Flemingiana 
  ?, 
  Recluz. 
  PI. 
  VI. 
  fig. 
  7. 
  

  

  Shell 
  pyriformly 
  ovate, 
  smooth 
  and 
  shining, 
  very 
  thick, 
  with 
  a 
  

   rather 
  small 
  umbilicus 
  almost 
  covered 
  by 
  a 
  thick, 
  tumid 
  callosity. 
  

   Whorls 
  very 
  rapidly 
  declining, 
  shallowly 
  concave 
  in 
  the 
  upper 
  portion 
  

   next 
  the 
  suture, 
  especially 
  in 
  the 
  case 
  of 
  the 
  body-whorl. 
  Spire 
  

   somewhat 
  exserted, 
  having 
  a 
  mammillary 
  aspect 
  in 
  consequence 
  of 
  

   the 
  concavity 
  of 
  the 
  upper 
  portion 
  of 
  the 
  body-whorl. 
  Aperture 
  

   semilunar, 
  small 
  ; 
  columella 
  thick 
  and 
  densely 
  callous, 
  especially 
  in 
  

   the 
  upper 
  part. 
  

  

  I 
  doubtfully 
  refer 
  to 
  this 
  species 
  three 
  specimens 
  which 
  agree 
  

   generally 
  with 
  the 
  figure 
  of 
  it 
  in 
  Reeve's 
  ' 
  Conchologia 
  Iconica'*, 
  

   but 
  which 
  have 
  a 
  more 
  tumid 
  callosity, 
  a 
  slightly 
  smaller 
  aperture, 
  

   and 
  a 
  rather 
  more 
  obtuse 
  apex, 
  besides 
  being 
  much 
  smaller 
  speci- 
  

   mens 
  than 
  the 
  one 
  there 
  figured. 
  But 
  as 
  these 
  are 
  all 
  slight 
  differ- 
  

   ences 
  of 
  degree 
  and 
  not 
  of 
  kind, 
  there 
  does 
  not 
  appear 
  any 
  necessity, 
  

   for 
  the 
  present 
  at 
  least, 
  for 
  referring 
  the 
  Javan 
  specimens 
  to 
  a 
  new 
  

   species. 
  Natica 
  Fleming 
  iana 
  occurs 
  recent 
  on 
  the 
  shores 
  of 
  the 
  Isle 
  

   of 
  Luzon, 
  in 
  the 
  Philippines. 
  

  

  Dimensions. 
  — 
  Length 
  ^1-inch, 
  breadth 
  y^inch; 
  length 
  of 
  aperture 
  

   i-J 
  inch, 
  breadth 
  -fa 
  inch. 
  

  

  Matrix. 
  — 
  A 
  reddish 
  marl, 
  containing 
  many 
  grains 
  of 
  white 
  

   quartzose 
  sand, 
  and 
  minute 
  black 
  particles 
  probably 
  of 
  volcanic 
  

   origin. 
  

  

  12. 
  Vicarta 
  (?) 
  callosa, 
  spec. 
  nov. 
  PI. 
  VII. 
  fig. 
  5." 
  

  

  Shell 
  thick, 
  turreted, 
  elongately 
  conical. 
  "Whorls 
  almost 
  cylin- 
  

   drical, 
  but 
  somewhat 
  wider 
  at 
  the 
  base 
  than 
  at 
  the 
  upper 
  portion 
  ; 
  

   with 
  a 
  raised 
  nodiferous 
  band 
  just 
  below 
  the 
  suture, 
  becoming 
  gradu- 
  

   ally 
  obsolete 
  in 
  the 
  upper 
  whorls 
  ; 
  and 
  also 
  ornamented 
  by 
  one 
  or 
  

   two 
  parallel 
  ridges, 
  closely 
  accompanied 
  above 
  by 
  a 
  minor 
  groove, 
  

   between 
  their 
  lower 
  margin 
  and 
  the 
  nodiferous 
  band. 
  Suture 
  linear, 
  

   indistinct, 
  occasionally 
  manifested 
  by 
  the 
  base 
  of 
  the 
  upper 
  whorl 
  

   being 
  produced 
  so 
  as 
  to 
  form 
  a 
  ridge. 
  Aperture 
  small, 
  obliquely 
  

   oval 
  ; 
  inner 
  lip 
  distinct, 
  furnished 
  with 
  a 
  very 
  large 
  and 
  very 
  thick 
  

   callosity, 
  which 
  extends 
  forwards 
  as 
  a 
  semicircle, 
  and 
  upwards, 
  in 
  

   the 
  shape 
  of 
  a 
  tongue, 
  as 
  far 
  as 
  the 
  row 
  of 
  tubercles 
  of 
  the 
  whorl 
  

   above. 
  Columella 
  thickened 
  at 
  a 
  distance 
  of 
  about 
  one-third 
  from 
  

   the 
  base. 
  Outer 
  lip 
  and 
  canal 
  broken 
  away. 
  

  

  The 
  nodiferous 
  band 
  carries 
  about 
  ten 
  inequidistant, 
  unequal, 
  

   obtuse, 
  compressed 
  tubercles, 
  or 
  short 
  spines; 
  and 
  also 
  a 
  distinct 
  

   groove 
  running 
  along 
  the 
  centre 
  and 
  over 
  the 
  apices 
  of 
  the 
  tubercles. 
  

   The 
  last 
  whorl 
  is 
  flat 
  at 
  the 
  base 
  and 
  rounded-off 
  towards 
  the 
  

   sides. 
  

  

  M. 
  de 
  Groot's 
  collection 
  contains 
  two 
  specimens 
  of 
  this 
  species, 
  but, 
  

   as 
  both 
  of 
  them 
  have 
  lost 
  their 
  epidermis 
  and 
  much 
  of 
  the 
  outer 
  

   shelly 
  layer, 
  and 
  are 
  moreover 
  in 
  a 
  condition 
  very 
  much 
  resembling 
  

   chalk, 
  and 
  consequently 
  very 
  friable, 
  they 
  do 
  not 
  exhibit 
  the 
  orna- 
  

   mentation 
  so 
  well 
  as 
  could 
  be 
  wished 
  ; 
  it 
  is, 
  therefore, 
  very 
  probable 
  

  

  * 
  " 
  Monograph 
  of 
  the 
  Genus 
  Natica," 
  pi. 
  18. 
  figs. 
  80 
  a, 
  80 
  b. 
  

  

  