﻿CHEMNiTZiA. 
  Panama 
  Shells. 
  389 
  

  

  ruptly 
  on 
  tlie 
  peripliery 
  of 
  the 
  last 
  whorl 
  ; 
  spire 
  witli 
  the 
  out- 
  

   lines 
  nearly 
  rectilinear 
  : 
  whorls 
  eight, 
  very 
  acutely 
  shouldered 
  

   above, 
  slightly 
  convex, 
  with 
  a 
  deep 
  suture 
  ; 
  last 
  whorl 
  long 
  : 
  

   aperture 
  subovate, 
  acute 
  at 
  both 
  extremities 
  : 
  labrum 
  thin 
  : 
  

   umbilicus 
  wanting. 
  

  

  Mean 
  divergence 
  about 
  23° 
  ; 
  length 
  .11 
  inch 
  ; 
  breadth 
  .043 
  

   inch 
  ; 
  length 
  of 
  spire 
  .07 
  inch. 
  

  

  Station. 
  — 
  Unknown. 
  

  

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

   Only 
  1 
  specimen 
  was 
  obtained. 
  

  

  221. 
  Chemnitzia 
  afBnis. 
  Nov. 
  sp. 
  

  

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

   whorl, 
  about 
  twenty-four 
  rather 
  slender 
  ribs, 
  which 
  terminate 
  

   abruptly 
  at 
  the 
  periphery 
  of 
  the 
  last 
  whorl 
  ; 
  very 
  smooth 
  an- 
  

   teriorly 
  : 
  spire 
  with 
  the 
  outlines 
  nearly 
  rectilinear 
  : 
  whorls 
  ten, 
  

   moderately 
  convex, 
  with 
  a 
  well 
  impressed 
  suture 
  ; 
  last 
  whorl 
  

   angular 
  at 
  the 
  periphery 
  : 
  aperture 
  subovate 
  : 
  labrum 
  thin 
  : 
  

   columella 
  rather 
  stout 
  : 
  umbilicus 
  wanting. 
  

  

  Mean 
  divergence 
  about 
  18° 
  ; 
  length 
  .21 
  inch 
  ; 
  breadth 
  .065 
  

   inch 
  ; 
  length 
  of 
  spire 
  .165 
  inch. 
  

  

  Most 
  easily 
  distinguished 
  from 
  C. 
  striosa 
  (p. 
  393), 
  by 
  the 
  

   sculpture 
  of 
  the 
  last 
  whorl. 
  

  

  Station. 
  — 
  Unknown. 
  

  

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

  

  2 
  specimens 
  were 
  found 
  in 
  the 
  sand. 
  

  

  222. 
  Chemnitzia 
  clathratiila. 
  Nov. 
  sp. 
  

  

  Shell 
  ovate 
  conic, 
  much 
  elongate: 
  white: 
  with, 
  on 
  each 
  

   whorl, 
  about 
  thirty 
  minute 
  ribs, 
  which 
  gradually 
  become 
  obso= 
  

   lete 
  on 
  the 
  periphery 
  of 
  the 
  last 
  whorl, 
  and 
  which 
  are 
  decussated 
  

   by 
  spiral 
  raised 
  lines, 
  of 
  which 
  five 
  or 
  six 
  appear 
  on 
  the 
  spire 
  

  

  