﻿406 
  Panama 
  Shells. 
  trochidje. 
  

  

  Mean 
  divergence 
  about 
  33° 
  ; 
  length 
  .085 
  incli 
  ; 
  breadth 
  .05 
  

   inch 
  ; 
  length 
  of 
  spire 
  .058 
  inch. 
  

  

  Station. 
  — 
  Unknown. 
  

  

  Eahitat 
  — 
  Panama 
  ; 
  0. 
  B. 
  A. 
  ! 
  

  

  4 
  specimens 
  were 
  found 
  in 
  the 
  calcareous 
  sand. 
  

  

  254. 
  Cin^ula 
  (?) 
  terebellum. 
  Nov. 
  sp. 
  

  

  Shell 
  subcylindric 
  : 
  white 
  : 
  with 
  four 
  very 
  prominent 
  com- 
  

   pressed 
  acute 
  spiral 
  keels, 
  of 
  which 
  two 
  are 
  seen 
  on 
  the 
  spire 
  : 
  

   apex 
  subacute 
  : 
  spire 
  with 
  the 
  outlines 
  moderately 
  curvilinear 
  : 
  

   whorls 
  six, 
  slightly 
  convex, 
  with 
  an 
  indistinct 
  suture 
  ; 
  last 
  

   whorl 
  small 
  : 
  aperture 
  small, 
  ovate, 
  acute 
  above 
  : 
  labrum 
  thin 
  : 
  

   labium 
  indistinct 
  : 
  umbilicus 
  wanting. 
  

  

  Mean 
  divergence 
  about 
  28° 
  ; 
  length 
  .08 
  inch 
  ; 
  breadth 
  .04 
  

   inch; 
  length 
  of 
  spire 
  .055 
  inch. 
  

  

  Station. 
  Unknown. 
  

  

  iZa&zto^.— 
  Panama 
  ; 
  C. 
  B. 
  A. 
  ! 
  

  

  1 
  specimen 
  was 
  found 
  in 
  the 
  calcareous 
  sand. 
  

  

  255. 
  Cingiila 
  (I) 
  turrita. 
  Nov. 
  sp. 
  

  

  Shell 
  conic, 
  elongate 
  : 
  white 
  : 
  with 
  numerous 
  prominent 
  com- 
  

   pressed 
  transverse 
  ribs, 
  which 
  terminate 
  a 
  little 
  above 
  the 
  su- 
  

   ture, 
  where 
  they 
  are 
  crossed 
  by 
  a 
  spiral 
  raised 
  line 
  ; 
  anteriorly 
  

   with 
  two 
  or 
  three 
  spiral 
  ridges 
  : 
  apex 
  acute 
  : 
  spire 
  with 
  the 
  out- 
  

   lines 
  nearly 
  rectilinear 
  : 
  whorls 
  six, 
  above 
  abruptly 
  shouldered, 
  

   planulate, 
  with 
  the 
  suture 
  in 
  a 
  broad 
  groove, 
  which 
  is 
  continued 
  

   along 
  the 
  periphery 
  of 
  the 
  last 
  whorl 
  : 
  aperture 
  small, 
  ovate, 
  

   acute 
  above, 
  very 
  slightly 
  effuse 
  : 
  labrum 
  thin 
  : 
  umbilical 
  region 
  

   with 
  a 
  very 
  minute 
  indentation. 
  

  

  Mean 
  divergence 
  about 
  30° 
  ; 
  length 
  .08 
  inch 
  ; 
  breadth 
  .033 
  

   inch 
  ; 
  length 
  of 
  spire 
  .024 
  inch. 
  

  

  Station. 
  — 
  Unknown. 
  

  

  