﻿1863.] 
  JENKINS 
  — 
  JAVAN 
  FOSSILS. 
  59 
  

  

  species 
  of 
  Turritella, 
  scarcely, 
  if 
  at 
  all, 
  distinguishable 
  from 
  that 
  under 
  

   consideration. 
  The 
  only 
  fossil 
  Shell 
  from 
  Java 
  hitherto 
  described* 
  

   is 
  also 
  allied 
  to 
  this 
  species. 
  

  

  Dimensions. 
  — 
  Figured 
  specimen: 
  length 
  (imperfect) 
  1J 
  inch, 
  

   breadth 
  § 
  inch 
  ; 
  length 
  of 
  aperture 
  \ 
  inch, 
  breadth 
  \ 
  inch. 
  

  

  Matrix. 
  — 
  A 
  greenish 
  and 
  grey 
  sand. 
  

  

  14. 
  TUKRITELLA 
  SIMPLEX, 
  Spec. 
  nOV. 
  

  

  Shell 
  thick, 
  turreted, 
  obtuse. 
  Whorls 
  with 
  a 
  single 
  acute 
  keel, 
  

   at 
  a 
  distance 
  of 
  about 
  one 
  -third 
  of 
  their 
  length 
  from 
  the 
  base 
  ; 
  

   marked 
  above 
  by 
  two 
  coarse, 
  indistinct 
  ridges 
  equidistant 
  from 
  one 
  

   another, 
  the 
  keel, 
  and 
  the 
  suture. 
  Aperture 
  nearly 
  round, 
  slightly 
  

   pentagonal, 
  and 
  flat 
  at 
  the 
  base. 
  

  

  The 
  epidermis 
  is 
  preserved 
  in 
  places, 
  and 
  exhibits 
  striae 
  in 
  the 
  

   direction 
  of 
  the 
  lines 
  of 
  growth. 
  The 
  upper 
  whorls 
  appear 
  to 
  be 
  

   somewhat 
  rounded, 
  and 
  not 
  keeled 
  ; 
  but 
  as 
  that 
  portion 
  of 
  the 
  shell, 
  

   in 
  the 
  only 
  specimen 
  sent 
  to 
  England 
  by 
  M. 
  de 
  Groot, 
  is 
  rather 
  badly 
  

   preserved, 
  this 
  may 
  be 
  accidental, 
  or, 
  rather, 
  due 
  to 
  attrition 
  or 
  

   weathering. 
  

  

  Turritella 
  simplex 
  approaches 
  very 
  closely 
  to 
  T. 
  suhangulata, 
  Brocc. 
  ; 
  

   but 
  it 
  differs 
  from 
  that 
  species 
  in 
  its 
  much 
  more 
  obtuse 
  form, 
  in 
  being 
  

   much 
  more 
  solid, 
  and 
  in 
  the 
  absence 
  of 
  the 
  fine 
  transverse, 
  striae 
  

   characteristic 
  of 
  the 
  latter, 
  and 
  which 
  are 
  replaced 
  in 
  this 
  species 
  by 
  

   two 
  obtuse, 
  indistinct 
  ridges. 
  Turritella 
  suhangulata 
  occurs 
  in 
  the 
  

   Miocene 
  beds 
  of 
  several 
  European 
  localities, 
  including 
  Antwerp, 
  

   Angers, 
  Baden, 
  &c, 
  several 
  places 
  in 
  Italy, 
  Switzerland, 
  &c. 
  ; 
  and, 
  

   according 
  to 
  M. 
  Abich, 
  it 
  also 
  occurs 
  in 
  the 
  Caucasus. 
  

  

  Dimensions. 
  — 
  Length 
  2 
  T 
  ^- 
  inches; 
  breadth 
  of 
  last 
  whorl 
  at 
  the 
  keel 
  

   1 
  inch 
  ; 
  length 
  of 
  aperture 
  y 
  5 
  ^ 
  inch, 
  breadth 
  y 
  5 
  ^ 
  inch. 
  

  

  Matrix. 
  — 
  A 
  light-grey 
  argillaceous 
  marl. 
  

  

  15. 
  Phasianella 
  ? 
  or 
  Paltjdina 
  ? 
  

  

  A 
  flattened 
  internal 
  cast, 
  ovate 
  in 
  longitudinal 
  section, 
  with 
  

   about 
  six 
  ventricose 
  whorls, 
  a 
  rather 
  elongated 
  spire, 
  and 
  an 
  oval 
  

   aperture 
  produced 
  above 
  almost 
  to 
  a 
  point, 
  appears 
  to 
  belong 
  either 
  

   to 
  the 
  genus 
  Phasianella 
  or 
  to 
  Paludina. 
  As 
  the 
  cast 
  consists 
  of 
  

   a 
  reddish 
  sandy 
  marl, 
  similar 
  to 
  the 
  material 
  composing 
  some 
  

   bivalve-casts 
  (Cytherea, 
  Tellina) 
  in 
  the 
  same 
  collection, 
  the 
  pro- 
  

   bability 
  is 
  that 
  the 
  specimen 
  belongs 
  to 
  the 
  marine 
  genus. 
  On 
  the 
  

   other 
  hand, 
  it 
  is 
  more 
  ventricose 
  and, 
  relatively, 
  much 
  shorter 
  than 
  

   any 
  known 
  species 
  of 
  Phasianella, 
  being, 
  perhaps, 
  most 
  nearly 
  allied 
  

   to 
  the 
  Australian 
  P. 
  ventricosa 
  ; 
  but 
  it 
  is 
  so 
  flattened, 
  that 
  it 
  would 
  

   be 
  unsafe 
  to 
  refer 
  it 
  positively 
  to 
  either 
  genus. 
  

  

  16. 
  Tuebo 
  obliqtjus, 
  spec. 
  nov. 
  PL 
  VII. 
  fig. 
  6. 
  

  

  Shell 
  conoid, 
  imperforate, 
  smooth, 
  with 
  a 
  produced 
  spire. 
  Whorls 
  

   obliquely 
  convex, 
  very 
  much 
  depressed 
  above, 
  slightly 
  concave 
  near 
  

   the 
  suture, 
  flattened 
  at 
  the 
  base. 
  Aperture 
  suborbicular, 
  produced 
  

   abpve 
  to 
  a 
  sharp 
  point 
  ; 
  columella 
  slightly 
  callous. 
  

  

  * 
  Palseontographica, 
  vol. 
  i. 
  Lief. 
  3. 
  p. 
  132. 
  pi. 
  18. 
  fig. 
  10. 
  

  

  