﻿452 
  Panama 
  Shells. 
  CALYPTRiElD^., 
  

  

  Habitat. 
  — 
  Unknown 
  ; 
  Desliayes. 
  

  

  Mazatlan 
  ; 
  Melchers 
  ! 
  Menke. 
  

   Mazatlan 
  ; 
  E. 
  Jewett 
  ! 
  Gould 
  MSS. 
  

   Taboga 
  and 
  Panama 
  ; 
  C. 
  B. 
  A. 
  ! 
  

  

  28 
  specimens 
  were 
  collected. 
  

  

  According 
  to 
  Dr. 
  Krauss, 
  C. 
  hejmtica 
  occurs 
  at 
  the 
  Cape 
  of 
  

   Good 
  Hope. 
  We 
  have 
  several 
  specimens, 
  collected 
  at 
  the 
  Cape 
  

   by 
  Dr. 
  K., 
  of 
  his 
  convex 
  variety, 
  which 
  differs 
  from 
  our 
  shells 
  

   in 
  having 
  the 
  septum 
  very 
  deeply 
  placed, 
  and 
  the 
  beak 
  very 
  

   prominent. 
  The 
  depressed 
  variety 
  figured 
  by 
  Dr. 
  K. 
  may 
  more 
  

   nearly 
  resemble 
  the 
  Pacific 
  shell, 
  but 
  we 
  have 
  no 
  specimens 
  for 
  

   comparison. 
  Probably, 
  however, 
  the 
  Cape 
  shells 
  belong 
  to 
  a 
  

   distinct 
  species 
  : 
  but 
  as 
  the 
  habitat 
  of 
  the 
  original 
  type 
  was 
  not 
  

   known, 
  and 
  as 
  the 
  original 
  description 
  is 
  applicable 
  to 
  both, 
  

   we 
  must 
  leave 
  this 
  question 
  undecided. 
  

  

  347. 
  Crepiclula 
  incurva. 
  

  

  Synonymy. 
  

  

  Calyptrcea 
  {^Cre^ndula) 
  incurva 
  Brod. 
  in 
  Proc. 
  Zoo). 
  Soc. 
  

  

  Lond. 
  p. 
  40. 
  - 
  - 
  May 
  1834. 
  

  

  Brod. 
  in 
  Trans. 
  Zool. 
  Soc. 
  

  

  Lond. 
  pi. 
  29. 
  f. 
  6. 
  - 
  1835. 
  

  

  Miill. 
  Synop. 
  Nov. 
  Test. 
  

  

  Viv. 
  p. 
  150. 
  - 
  - 
  May 
  1836. 
  

  

  Orb. 
  Voy. 
  Amer. 
  Merid. 
  

  

  Moll. 
  p. 
  468. 
  - 
  - 
  1843. 
  

  

  Station. 
  — 
  On 
  dead 
  shells 
  dredged 
  from 
  sandy 
  mud, 
  at 
  a 
  depth 
  

   ranging 
  from 
  6 
  to 
  10 
  fathoms 
  ; 
  Cuming 
  ! 
  Broderip, 
  

  

  Our 
  specimens 
  were 
  found 
  adhering 
  to 
  living 
  shells 
  at 
  and 
  

   near 
  low 
  water 
  mark. 
  Its 
  favorite 
  station 
  was 
  on 
  the 
  shell 
  

   which 
  we 
  have 
  mentioned 
  as 
  Troclius 
  sp. 
  indet. 
  5, 
  almost 
  every 
  

   one 
  of 
  which 
  supported 
  one 
  or 
  more 
  of 
  this 
  Crepidula. 
  Turho 
  

   saxosus 
  was 
  next 
  in 
  the 
  frequency 
  with 
  which 
  it 
  furnished 
  

   specimens. 
  The 
  species 
  was 
  found 
  also 
  on 
  Columbella 
  rugosa, 
  

   C. 
  varia, 
  Buccinum, 
  ringens, 
  Purpura 
  tecta, 
  P. 
  undulata, 
  Trochus 
  

  

  