﻿CHEMNITZIA. 
  Panama 
  Shells. 
  393 
  

  

  near 
  : 
  whorls 
  eleven, 
  convex, 
  with 
  a 
  rather 
  deep 
  suture 
  : 
  last 
  

   whorl 
  rather 
  long, 
  with 
  the 
  periphery 
  well 
  rounded 
  : 
  aperture 
  

   subovate 
  : 
  labrum 
  thin 
  : 
  columella 
  straight 
  : 
  umbilicus 
  wanting. 
  

   Mean 
  divergence 
  about 
  17° 
  ; 
  length 
  .17 
  inch 
  ; 
  breadth 
  .045 
  

   inch 
  ; 
  length 
  of 
  spire 
  .13 
  inch. 
  

  

  Station. 
  — 
  Unknown. 
  

  

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

  

  2 
  specimens 
  were 
  found 
  in 
  the 
  sand. 
  

  

  229. 
  Cheinnitzia 
  striosa. 
  Nov. 
  sp. 
  

  

  Shell 
  long, 
  conic 
  : 
  yellowish 
  brown 
  : 
  with, 
  on 
  each 
  whorl, 
  

   about 
  forty 
  very 
  minute 
  slender 
  ribs, 
  which 
  gradually 
  become 
  

   obsolete 
  on 
  the 
  periphery 
  of 
  the 
  last 
  whorl 
  ; 
  covered 
  with 
  dis- 
  

   tinct 
  spiral 
  strise, 
  of 
  which 
  one 
  a 
  little 
  below 
  the 
  suture 
  and 
  also 
  

   those 
  which 
  are 
  anterior 
  are 
  larger 
  : 
  spire 
  with 
  the 
  outlines 
  

   nearly 
  rectilinear 
  : 
  whorls 
  ten, 
  slightly 
  convex, 
  with 
  a 
  well 
  

   impressed 
  suture 
  : 
  aperture 
  ovate, 
  acute 
  above 
  : 
  labrum 
  thin 
  : 
  

   columella 
  a 
  little 
  twisted 
  : 
  umbilicus 
  wanting. 
  

  

  Mean 
  divergence 
  about 
  20^ 
  ; 
  length 
  .21 
  inch 
  : 
  breadth 
  .06 
  

   inch 
  ; 
  length 
  of 
  spire 
  .16 
  inch. 
  

  

  Station. 
  — 
  Unknown. 
  

  

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

   1 
  specimen 
  was 
  found 
  in 
  the 
  sand. 
  

  

  230. 
  Chemnitzia 
  tiirrita. 
  Nov.sp. 
  

  

  Shell 
  subcylindric 
  in 
  the 
  lower 
  whorls, 
  conic 
  in 
  the 
  upper 
  

   whorls 
  : 
  white 
  : 
  with, 
  on 
  each 
  whorl, 
  about 
  eighteen 
  sharp 
  

   compressed 
  slender 
  ribs, 
  which 
  are 
  less 
  prominent 
  on 
  the 
  last 
  

   whorl, 
  and 
  terminate 
  abruptly 
  at 
  its 
  periphery 
  ; 
  with 
  an 
  impressed 
  

   spiral 
  line 
  next 
  below 
  the 
  upper 
  margin 
  of 
  the 
  whorls, 
  another 
  

   at 
  the 
  periphery 
  of 
  the 
  last 
  whorl, 
  and 
  an 
  anterior 
  spiral 
  groove 
  : 
  

   spire 
  with 
  the 
  outlines 
  curvilinear 
  aboVe 
  the 
  middle, 
  otherwise 
  

   nearly 
  rectilinear 
  : 
  whorls 
  ten, 
  acutely 
  shouldered, 
  slightly 
  con- 
  

  

  JULY, 
  1852. 
  35 
  Ann. 
  Ltc. 
  Nat. 
  Hist. 
  

  

  