﻿368 
  Panama 
  Shells. 
  muricid.e. 
  

  

  Mean 
  divergence 
  about 
  38° 
  ; 
  length 
  .95 
  inch 
  ; 
  breadth 
  .35 
  

   inch 
  ; 
  length 
  of 
  spire 
  .62 
  inch. 
  

  

  Having 
  received 
  from 
  Mr. 
  Cuming 
  specimens 
  of 
  this 
  species 
  

   labelled 
  P. 
  zonulata, 
  we 
  infer 
  that 
  it 
  has 
  been 
  confounded 
  with 
  

   that 
  species 
  in 
  collections. 
  Mr. 
  Cuming's 
  specimens 
  are 
  said 
  

   in 
  the 
  MS. 
  catalogue 
  to 
  have 
  come 
  from 
  the 
  Philippine 
  Is., 
  

   but 
  as 
  their 
  specific 
  identity 
  with 
  our 
  species 
  is 
  unquestionable, 
  

   it 
  is 
  probable 
  that 
  the 
  catalogue 
  is 
  erroneous. 
  

  

  Station. 
  — 
  Unknown. 
  

  

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

  

  We 
  obtained 
  1 
  fresh 
  and 
  1 
  faded 
  specimen. 
  

  

  175. 
  Pleurotoiua 
  incrassata. 
  

  

  Synonymy. 
  

  

  Plewotoma 
  incrassata 
  Sowb. 
  in 
  Proc. 
  Zool. 
  Soc. 
  Lond. 
  

  

  p. 
  138. 
  . 
  - 
  - 
  - 
  Dec. 
  1833. 
  

  

  . 
  Miill. 
  Synop. 
  Nov. 
  Test. 
  Viv. 
  p. 
  115. 
  May 
  1836. 
  

  

  Bottce 
  Kiener 
  Iconog. 
  p. 
  33. 
  pi. 
  15. 
  f. 
  2. 
  

  

  incrassata 
  Reeve 
  Concli. 
  Icon. 
  pi. 
  9. 
  f. 
  76. 
  Apr. 
  1843. 
  

  

  Station. 
  — 
  Sandy 
  mud 
  at 
  the 
  depth 
  of 
  6 
  to 
  10 
  fathoms; 
  Cum- 
  

   ing 
  ! 
  Sowerby 
  : 
  also 
  Eeeve. 
  

  

  Habitat. 
  — 
  Panama, 
  and 
  Monte 
  Christi 
  ; 
  Cuming 
  ! 
  Sowerby. 
  

  

  Mazatlan 
  ; 
  Botta 
  ! 
  (?) 
  Kiener. 
  

  

  Bay 
  of 
  Panama, 
  &c. 
  ; 
  Cuming 
  ! 
  Reeve. 
  

  

  Mazatlan; 
  Melchers! 
  Menke. 
  

  

  Panama 
  ; 
  C. 
  B. 
  A. 
  ! 
  

   1 
  specimen 
  was 
  obtained. 
  

  

  176. 
  Pleurotoma 
  nigerrima. 
  

  

  Synonym,y. 
  

  

  Pleurotoma 
  nigerrima 
  Sowb. 
  in 
  Proc. 
  Zool. 
  Soc. 
  Lond. 
  

  

  p. 
  137. 
  Dec. 
  1833. 
  

  

  