﻿380 
  Panama 
  Shells. 
  mukicID^. 
  

  

  204. 
  Cerithium 
  pulchrum. 
  Nov. 
  sp. 
  

  

  Shell 
  rather 
  long, 
  subconic 
  : 
  very 
  dark 
  brownish 
  red, 
  with 
  

   a 
  yellowish 
  white 
  spiral 
  line 
  on 
  the 
  middle 
  of 
  the 
  whorls 
  : 
  with 
  

   about 
  forty 
  slender 
  acute 
  ribs 
  on 
  each 
  whorl, 
  which 
  terminate 
  

   abruptly 
  on 
  the 
  periphery 
  of 
  the 
  last 
  whorl 
  ; 
  with 
  very 
  stout 
  

   varices 
  240° 
  distant 
  ; 
  with 
  a 
  narrow 
  acute 
  spiral 
  keel, 
  above 
  the 
  

   middle 
  of 
  the 
  whorls, 
  traversing 
  the 
  ribs 
  and 
  varices 
  : 
  with 
  a 
  

   few 
  raised 
  spiral 
  lines 
  and 
  many 
  minute 
  spiral 
  striae, 
  which 
  do 
  

   not 
  traverse 
  the 
  ribs 
  ; 
  anteriorly 
  with 
  crowded 
  coarse 
  spiral 
  

   striae 
  : 
  apex 
  acute 
  : 
  spire 
  with 
  the 
  outlines 
  moderately 
  curvi- 
  

   linear 
  : 
  whorls 
  eleven, 
  convex, 
  with 
  a 
  deep 
  suture 
  ; 
  last 
  whorl 
  

   short 
  : 
  aperture 
  large, 
  quadrate-orbicular, 
  broadly 
  effuse 
  above, 
  

   with 
  a 
  very 
  narrow 
  sinus 
  in 
  place 
  of 
  the 
  canal 
  ; 
  labrum 
  and 
  

   labium 
  continuous, 
  very 
  thick 
  and 
  highly 
  polished. 
  

  

  Mean 
  divergence 
  about 
  33° 
  ; 
  length 
  1.25 
  inch 
  ; 
  breadth 
  .65 
  

   inch 
  ; 
  length 
  of 
  spire 
  .82 
  inch. 
  

  

  This 
  species 
  must 
  closely 
  resemble 
  C. 
  Montagnei 
  Orb. 
  But 
  in 
  

   Kiener's 
  figure 
  and 
  description, 
  Orbigny's 
  species 
  appears 
  to 
  be 
  

   destitute 
  of 
  varices. 
  Menke, 
  however, 
  in 
  his 
  specimen 
  of 
  G. 
  

   Montagnei 
  from 
  Mazatlan, 
  finds 
  48 
  ribs 
  on 
  the 
  last 
  whorl, 
  but 
  

   mentions 
  no 
  varices. 
  

  

  Station. 
  — 
  Half 
  buried 
  in 
  muddy 
  sand 
  under 
  bushes 
  at 
  high 
  

   water 
  mark. 
  

  

  Habitat. 
  — 
  Panama 
  ; 
  C. 
  B. 
  A. 
  ! 
  

  

  125 
  specimens 
  were 
  collected, 
  near 
  the 
  mangrove 
  thicket, 
  2i 
  

   miles 
  east 
  of 
  Panama. 
  

  

  205. 
  Cerithium 
  ReeTianuni« 
  Nov. 
  sp. 
  

  

  Shell 
  rather 
  long, 
  subconic 
  : 
  dark 
  reddish 
  brown, 
  with 
  a 
  yel- 
  

   lowish 
  white 
  spiral 
  line 
  on 
  the 
  middle 
  of 
  the 
  whorls, 
  which 
  is 
  

   darker 
  between 
  the 
  ribs 
  ; 
  with 
  a 
  similar 
  spiral 
  hne 
  anteriorly, 
  

   and 
  another 
  tipping 
  the 
  upper 
  ends 
  of 
  the 
  ribs 
  on 
  the 
  lower 
  

   whorls 
  : 
  without 
  varices 
  : 
  on 
  each 
  whorl 
  with 
  about 
  twenty- 
  

   four 
  prominent 
  subacute, 
  not 
  approximate, 
  ribs, 
  which 
  are 
  less 
  

  

  