﻿cerithium:. 
  Panama 
  Shelb. 
  88X 
  

  

  regular 
  and 
  prominent 
  on 
  the 
  last 
  whorl, 
  on 
  the 
  periphery 
  of 
  

   which 
  they 
  become 
  obsolete 
  ; 
  anteriorly 
  with 
  spiral 
  raised 
  lines, 
  

   of 
  which 
  one 
  near 
  the 
  periphery 
  is 
  larger 
  : 
  apex 
  acute 
  : 
  spire 
  

   with 
  the 
  outlines 
  moderately 
  curvilinear: 
  whorls 
  fifteen, 
  con- 
  

   vex, 
  with 
  a 
  well 
  impressed 
  suture: 
  aperture 
  large, 
  quadrate- 
  

   orbicular, 
  broadly 
  effuse 
  above, 
  with 
  a 
  narrow 
  sinus 
  in 
  place 
  of 
  

   the 
  canal 
  : 
  labrum 
  and 
  labium 
  thick,' 
  not 
  continuous 
  ; 
  labium 
  

   reflected 
  below. 
  

  

  It 
  resembles 
  Orbigny's 
  figure 
  (not 
  Kiener's) 
  of 
  C. 
  Montagnei; 
  

   Orbigny's 
  description 
  is 
  too 
  meagre 
  to 
  enable 
  us 
  to 
  identify 
  our 
  

   species 
  with 
  it, 
  and 
  the 
  figure 
  represents 
  it 
  with 
  flattened 
  

   approximate 
  ribs, 
  and 
  with 
  several 
  spiral 
  white 
  bands, 
  most 
  

   of 
  which 
  are 
  wanting 
  on 
  our 
  shell. 
  

  

  Mean 
  divergence 
  about 
  28° 
  ; 
  length 
  1.55 
  inch 
  ; 
  breadth 
  .QQ 
  

   inch 
  ; 
  length 
  of 
  spire 
  1.04 
  inch. 
  

  

  Station. 
  — 
  With 
  G. 
  ;pulchrum^ 
  q. 
  v. 
  

  

  Habitat. 
  — 
  Panama 
  ; 
  C 
  B. 
  A. 
  ! 
  

  

  190 
  specimens 
  were 
  collected 
  with 
  C. 
  pulchrum. 
  

  

  206. 
  Cerithiiini 
  Talidiim. 
  Nov. 
  sp. 
  

  

  Shell 
  long, 
  conic 
  : 
  dark 
  reddish 
  brown, 
  with 
  a 
  pale 
  spiral 
  line 
  

   along 
  the 
  middle 
  of 
  the 
  whorls 
  : 
  rufous 
  on 
  the 
  varices, 
  and 
  white 
  

   in 
  the 
  aperture: 
  sometimes 
  whitish 
  on 
  the 
  varices, 
  the 
  spiral 
  

   ridges, 
  and 
  the 
  last 
  whorl 
  : 
  with, 
  on 
  each 
  whorl, 
  about 
  twenty 
  

   arcuate 
  ridges, 
  which 
  are 
  prominent 
  and 
  rather 
  narrow 
  but 
  not 
  

   compressed, 
  and 
  which 
  terminate 
  abruptly 
  at 
  the 
  periphery 
  of 
  

   the 
  last 
  whorl 
  : 
  with 
  stout 
  varices 
  about 
  270° 
  distant 
  : 
  with 
  six 
  

   spiral 
  ridges, 
  of 
  which 
  two 
  next 
  below 
  the 
  suture 
  are 
  small 
  and 
  

   approximate, 
  and 
  are 
  sometimes 
  replaced 
  by 
  a 
  single 
  ridge 
  : 
  

   and 
  of 
  which 
  one 
  is 
  partly 
  concealed 
  in 
  the 
  suture 
  : 
  with 
  inter- 
  

   mediate 
  minute 
  spiral 
  striae 
  : 
  anteriorly 
  covered 
  with 
  slightly 
  

   wrinkled 
  spiral 
  ridges 
  : 
  apex 
  acute 
  : 
  spire 
  with 
  the 
  outlines 
  mode- 
  

   rately 
  curvilinear 
  : 
  whorls 
  twelve, 
  convex, 
  with 
  a 
  deep 
  suture 
  : 
  

   last 
  whorl 
  subangular 
  at 
  the 
  periphery, 
  very 
  short 
  : 
  aperture 
  

  

  