﻿DOLIUM. 
  Panama 
  Shells. 
  297 
  

  

  with 
  five 
  crowded 
  spiral 
  stride 
  : 
  apex 
  acute 
  : 
  spire 
  conic 
  : 
  whorls 
  

   eight, 
  scarcely 
  convex 
  : 
  aperture 
  ovate 
  : 
  labrum 
  much 
  thickened, 
  

   with 
  a 
  few 
  plaits 
  inside 
  : 
  columellar 
  lip 
  irregularly 
  plaited 
  : 
  

   with 
  a 
  short 
  well 
  notched 
  canal. 
  

  

  Mean 
  divergence 
  about 
  38° 
  ; 
  length 
  .72 
  inch 
  ; 
  breadth 
  .82 
  

   inch. 
  

  

  I 
  take 
  pleasure 
  in 
  dedicating 
  this 
  species 
  to 
  William 
  Stimp- 
  

   son, 
  Esq., 
  whose 
  researches 
  on 
  the 
  Mollusca 
  of 
  this 
  country 
  

   will 
  furnish 
  a 
  most 
  valuable 
  contribution 
  to 
  Malacology. 
  

  

  Station. 
  — 
  Under 
  stones, 
  near 
  low 
  water 
  mark. 
  

  

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

  

  We 
  obtained 
  19 
  specimens, 
  of 
  which 
  a 
  few 
  only 
  were 
  alive. 
  

  

  66. 
  Doliiim 
  rin^ens. 
  

  

  Synonymy. 
  

  

  Cassis 
  ringens 
  Swains, 
  in 
  Bligh 
  Catal. 
  App. 
  p. 
  4. 
  May 
  1822. 
  

  

  Dolium 
  dentatum 
  Barnes 
  Ann. 
  Lye. 
  Nat. 
  Hist. 
  N. 
  York 
  

  

  I. 
  135. 
  384. 
  pi. 
  9. 
  f. 
  3. 
  - 
  - 
  - 
  - 
  1824. 
  

  

  Cassis 
  ringens 
  Sowb. 
  Tank, 
  Catal. 
  p. 
  21. 
  1825. 
  

  

  Buccinum 
  Wood 
  Ind. 
  Test. 
  Supp. 
  pi. 
  4. 
  f. 
  1. 
  1828. 
  

  

  Dolium 
  personatum 
  Menke 
  Synop. 
  p. 
  62. 
  1830. 
  

  

  Malea 
  latilabris 
  Valenc. 
  in 
  Humb. 
  Rec. 
  Obs. 
  II. 
  325. 
  1833. 
  

  

  crassilabris 
  Valenc. 
  in 
  Humb. 
  Rec. 
  Obs. 
  II. 
  327. 
  var. 
  1834. 
  

  

  Dolium 
  latilabre 
  Kiener 
  Iconog. 
  p. 
  14.pl. 
  4. 
  f. 
  7. 
  1835. 
  

  

  Dolium 
  plicosum 
  Menke 
  in 
  Zeitsch. 
  Malak. 
  p. 
  138. 
  1845. 
  

  

  ringens 
  Reeve 
  Conch. 
  Icon. 
  pi. 
  4. 
  f. 
  5. 
  Dec. 
  1848. 
  

  

  dentatum 
  Jay 
  Catal. 
  Dec. 
  1850. 
  

  

  crassilabre 
  Menke 
  in 
  Zeitschr. 
  Malak. 
  p. 
  182. 
  Apr. 
  1851. 
  

  

  One 
  of 
  our 
  specimens 
  is 
  4.25 
  inches 
  long, 
  but 
  most 
  of 
  them 
  

   are 
  small. 
  One, 
  with 
  an 
  excessively 
  thickened 
  lip 
  and 
  a 
  deep 
  

   groove 
  behind 
  the 
  lip, 
  is 
  only 
  2.3 
  inches 
  long. 
  Mr. 
  Eeeve's 
  

   figure 
  represents 
  a 
  fine 
  specimen 
  bi 
  inches 
  long. 
  One 
  in 
  the 
  

   Mus. 
  Amh. 
  is 
  6 
  inches 
  long. 
  Mr. 
  Barnes 
  notices 
  a 
  specimen 
  9 
  

   inches 
  long 
  and 
  7 
  inches 
  wide. 
  

  

  JULY, 
  1852. 
  29 
  Anh. 
  Ltc. 
  Nat. 
  Hist. 
  

  

  