﻿518 
  . 
  Panama 
  Shells. 
  cORBULiDiE. 
  

  

  Florida 
  ; 
  Hanley. 
  

   Panama 
  ; 
  0. 
  B. 
  A. 
  ! 
  

   We 
  collected 
  6 
  odd 
  valves 
  of 
  this 
  rare 
  and 
  elegant 
  shell. 
  L. 
  

   canaliculata 
  Say 
  is 
  the 
  Atlantic 
  analogue. 
  Dr. 
  Gould 
  has 
  shown 
  

   us 
  his 
  L. 
  undulata, 
  which 
  is 
  quite 
  distinct 
  from 
  either 
  species. 
  

   Mr. 
  Hanley 
  must 
  be 
  in 
  error 
  as 
  to 
  the 
  habitat 
  of 
  the 
  species. 
  

   Its 
  Atlantic 
  analogue 
  inhabits 
  Florida, 
  but 
  is 
  not 
  likely 
  to 
  have 
  

   been 
  confounded 
  with 
  this 
  shell. 
  

  

  496. 
  macfra 
  velata. 
  

  

  Synonymy. 
  

  

  Mactra 
  velata 
  Phil 
  in 
  Zeitschr. 
  Mai. 
  p. 
  153. 
  No. 
  10 
  for 
  1848. 
  Mar. 
  1849. 
  

   Phil. 
  Abbild. 
  III. 
  pi. 
  3. 
  f. 
  5. 
  Nov. 
  1850. 
  

  

  This 
  shell 
  attains 
  a 
  length 
  of 
  4 
  inches. 
  A 
  small 
  variety 
  (a) 
  has 
  

   the 
  posterior 
  dorsal 
  outline 
  much 
  less 
  excurved. 
  It 
  may 
  possi- 
  

   bly 
  be 
  a 
  distinct 
  species. 
  Col. 
  Jewett's 
  specimens 
  belong 
  to 
  this 
  

   type. 
  

  

  Station. 
  — 
  Unknown 
  . 
  

  

  Habitat. 
  — 
  Panama 
  ; 
  E. 
  B. 
  Philippi 
  ! 
  Philippi. 
  

  

  Panama; 
  Troschel. 
  

  

  Panama 
  ; 
  Col. 
  Jewett 
  ! 
  Gould 
  MSS. 
  

  

  Panama 
  ; 
  C. 
  B. 
  A. 
  ! 
  

   10 
  specimens 
  were 
  found 
  on 
  the 
  reef. 
  

  

  Family— 
  COKBULID^. 
  

  

  497. 
  Anatina 
  alta. 
  Nov. 
  sp. 
  

  

  Shell 
  ovate, 
  short 
  ; 
  anteriorly 
  subangular 
  and 
  flexuous 
  ; 
  

   otherwise 
  with 
  the 
  margins 
  well 
  rounded 
  : 
  pearl-white, 
  with 
  a 
  

   thin 
  brownish 
  epidermis 
  : 
  with 
  unequal 
  striae 
  of 
  growth 
  ; 
  

   surface 
  microscopically 
  sagrinate: 
  beaks 
  small, 
  prominent, 
  

   approximate 
  : 
  umbones 
  moderately 
  convex 
  : 
  spoon-shaped 
  tooth 
  

   followed 
  by 
  a 
  well 
  rounded 
  deep 
  sinus 
  under 
  the 
  beak. 
  

  

  